List of Lost episodes
# List of Lost episodes

A total of 121 Lost episodes aired between September 22, 2004, and May 23, 2010. J. J. Abrams, who co-created the American serial drama television series Lost with Damon Lindelof, directed the pilot episode, which was based upon an original script titled Nowhere written by Jeffrey Lieber. Six seasons of the show aired, in addition to numerous clip shows to recap previous episodes.

The series follows the experiences of the survivors of a plane crash on a passenger jet, Oceanic Flight 815, which crashed on a tropical island in the South Pacific, with each episode typically featuring action on the island as well as a secondary storyline from another point in a character's life. The series also includes stories of the lives of people already living on the island — they include the "Others", who initially antagonize the survivors, as well as a group of people who arrive on the freighter Kahana. Lost: Missing Pieces consists of thirteen original two- to three-minute clips referred to as "mobisodes" which were produced for cell phones and released between seasons three and four. Multiple former and recurring cast members made an appearance in the series finale.

## Series overview

| Season | Episodes | Episodes | Originally aired | Originally aired | Avg. viewers (millions) | Rank |
| - | - | - | - | - | - | - |
| Season | Episodes | Episodes | First aired | Last aired | Avg. viewers (millions) | Rank |
| 1 | 25 | 25 | September 22, 2004 (2004-09-22) | May 25, 2005 (2005-05-25) | 15.69 | 15 |
| 2 | 24 | 24 | September 21, 2005 (2005-09-21) | May 24, 2006 (2006-05-24) | 15.50 | 15 |
| 3 | 23 | 23 | October 4, 2006 (2006-10-04) | May 23, 2007 (2007-05-23) | 17.84 | 10 |
| 4 | 14 | 14 | January 31, 2008 (2008-01-31) | May 29, 2008 (2008-05-29) | 13.40 | 17 |
| 5 | 17 | 17 | January 21, 2009 (2009-01-21) | May 13, 2009 (2009-05-13) | 10.94 | 28 |
| 6 | 18 | 18 | February 2, 2010 (2010-02-02) | May 23, 2010 (2010-05-23) | 10.08 | 31 |

## Episodes

In the following list, the term "featured character(s)" refers to the character or characters who are featured in the secondary storyline of each episode.

### Season 1 (2004–05)

Season one aired from September 22, 2004, to May 25, 2005. In addition to the twenty-four regular episodes in season one, a special, "Lost: The Journey", aired on April 27, 2005, to put the mysteries of the island and the characters in perspective in the lead-up to the season finale.

Season one begins when a plane crash strands the surviving passengers of Oceanic Flight 815 on a seemingly deserted tropical island, forcing the group of strangers to work together to stay alive. However, their survival is threatened by several mysteries, including the contents of a hatch buried in the ground, an unknown entity that roams the jungle, and the motives of the inhabitants already living on the island known as the "Others". Season one covers a narrative time of 44 days.

The first season averaged 15.69 million viewers per episode. The average of the live ratings presented below for season one is 18.38 million viewers per episode.

| No. overall | No. in season | Title | Directed by | Written by | Featured character(s) | Original air date | U.S. viewers (millions) |
| - | - | - | - | - | - | - | - |
| 1 | 1 | "Pilot (Part 1)" | J. J. Abrams | Story by : Jeffrey Lieber and J. J. Abrams & Damon Lindelof Teleplay by : J. J. Abrams & Damon Lindelof | Jack | September 22, 2004 (2004-09-22) | 18.65 |
| 2 | 2 | "Pilot (Part 2)" | J. J. Abrams | Story by : Jeffrey Lieber and J. J. Abrams & Damon Lindelof Teleplay by : J. J. Abrams & Damon Lindelof | Charlie & Kate | September 29, 2004 (2004-09-29) | 17.00 |
| 3 | 3 | "Tabula Rasa" | Jack Bender | Damon Lindelof | Kate | October 6, 2004 (2004-10-06) | 16.54 |
| 4 | 4 | "Walkabout" | Jack Bender | David Fury | Locke | October 13, 2004 (2004-10-13) | 18.16 |
| 5 | 5 | "White Rabbit" | Kevin Hooks | Christian Taylor | Jack | October 20, 2004 (2004-10-20) | 16.82 |
| 6 | 6 | "House of the Rising Sun" | Michael Zinberg | Javier Grillo-Marxuach | Sun | October 27, 2004 (2004-10-27) | 16.83 |
| 7 | 7 | "The Moth" | Jack Bender | Jennifer Johnson & Paul Dini | Charlie | November 3, 2004 (2004-11-03) | 18.73 |
| 8 | 8 | "Confidence Man" | Tucker Gates | Damon Lindelof | Sawyer | November 10, 2004 (2004-11-10) | 18.44 |
| 9 | 9 | "Solitary" | Greg Yaitanes | David Fury | Sayid | November 17, 2004 (2004-11-17) | 17.64 |
| 10 | 10 | "Raised by Another" | Marita Grabiak | Lynne E. Litt | Claire | December 1, 2004 (2004-12-01) | 17.15 |
| 11 | 11 | "All the Best Cowboys Have Daddy Issues" | Stephen Williams | Javier Grillo-Marxuach | Jack | December 8, 2004 (2004-12-08) | 18.88 |
| 12 | 12 | "Whatever the Case May Be" | Jack Bender | Damon Lindelof & Jennifer Johnson | Kate | January 5, 2005 (2005-01-05) | 21.59 |
| 13 | 13 | "Hearts and Minds" | Rod Holcomb | Carlton Cuse & Javier Grillo-Marxuach | Boone | January 12, 2005 (2005-01-12) | 20.81 |
| 14 | 14 | "Special" | Greg Yaitanes | David Fury | Michael & Walt | January 19, 2005 (2005-01-19) | 19.69 |
| 15 | 15 | "Homecoming" | Kevin Hooks | Damon Lindelof | Charlie | February 9, 2005 (2005-02-09) | 19.48 |
| 16 | 16 | "Outlaws" | Jack Bender | Drew Goddard | Sawyer | February 16, 2005 (2005-02-16) | 17.87 |
| 17 | 17 | "...In Translation" | Tucker Gates | Javier Grillo-Marxuach & Leonard Dick | Jin | February 23, 2005 (2005-02-23) | 19.49 |
| 18 | 18 | "Numbers" | Daniel Attias | David Fury & Brent Fletcher | Hurley | March 2, 2005 (2005-03-02) | 18.85 |
| 19 | 19 | "Deus Ex Machina" | Robert Mandel | Carlton Cuse & Damon Lindelof | Locke | March 30, 2005 (2005-03-30) | 17.75 |
| 20 | 20 | "Do No Harm" | Stephen Williams | Janet Tamaro | Jack | April 6, 2005 (2005-04-06) | 17.12 |
| 21 | 21 | "The Greater Good" | David Grossman | Leonard Dick | Sayid | May 4, 2005 (2005-05-04) | 17.20 |
| 22 | 22 | "Born to Run" | Tucker Gates | Story by : Javier Grillo-Marxuach Teleplay by : Edward Kitsis & Adam Horowitz | Kate | May 11, 2005 (2005-05-11) | 17.10 |
| 23 | 23 | "Exodus (Part 1)" | Jack Bender | Damon Lindelof & Carlton Cuse | various | May 18, 2005 (2005-05-18) | 18.62 |
| 24 | 24 | "Exodus (Parts 2 & 3)" | Jack Bender | Damon Lindelof & Carlton Cuse | various | May 25, 2005 (2005-05-25) | 20.71 |
| 25 | 25 | "Exodus (Parts 2 & 3)" | Jack Bender | Damon Lindelof & Carlton Cuse | various | May 25, 2005 (2005-05-25) | 20.71 |

### Season 2 (2005–06)

Season two aired from September 21, 2005, to May 24, 2006. In addition to the twenty-three regular episodes, three specials were aired that provided recaps and insights into the show's mysteries. There were several cast changes in season two. Ian Somerhalder, who played Boone, left the show, while Malcolm David Kelley, who played Walt, only appeared in four episodes. Michelle Rodriguez, Adewale Akinnuoye-Agbaje and Cynthia Watros joined the main cast as Ana Lucia, Mr. Eko, and Libby, respectively.

Season two introduced several new characters to the series, including the plane's tail-section survivors and other island inhabitants. More island mythologies and insights into the survivors' pasts are divulged. The existence of the Dharma Initiative and its benefactor, the Hanso Foundation, is established. The truth about the "Others" begins to unfold. Season two takes place over 23 days.

The second season averaged a total of 15.50 million viewers. The average of the live ratings presented below for season two is 18.91 million viewers per episode.

| No. overall | No. in season | Title | Directed by | Written by | Featured character(s) | Original air date | U.S. viewers (millions) |
| - | - | - | - | - | - | - | - |
| 26 | 1 | "Man of Science, Man of Faith" | Jack Bender | Damon Lindelof | Jack | September 21, 2005 (2005-09-21) | 23.47 |
| 27 | 2 | "Adrift" | Stephen Williams | Steven Maeda & Leonard Dick | Michael | September 28, 2005 (2005-09-28) | 23.17 |
| 28 | 3 | "Orientation" | Jack Bender | Javier Grillo-Marxuach & Craig Wright | Locke | October 5, 2005 (2005-10-05) | 22.38 |
| 29 | 4 | "Everybody Hates Hugo" | Alan Taylor | Edward Kitsis & Adam Horowitz | Hurley | October 12, 2005 (2005-10-12) | 21.66 |
| 30 | 5 | "...And Found" | Stephen Williams | Carlton Cuse & Damon Lindelof | Sun & Jin | October 19, 2005 (2005-10-19) | 21.38 |
| 31 | 6 | "Abandoned" | Adam Davidson | Elizabeth Sarnoff | Shannon | November 9, 2005 (2005-11-09) | 20.01 |
| 32 | 7 | "The Other 48 Days" | Eric Laneuville | Damon Lindelof & Carlton Cuse | Ana Lucia, Bernard, Libby and Mr. Eko | November 16, 2005 (2005-11-16) | 21.87 |
| 33 | 8 | "Collision" | Stephen Williams | Javier Grillo-Marxuach & Leonard Dick | Ana Lucia | November 23, 2005 (2005-11-23) | 19.29 |
| 34 | 9 | "What Kate Did" | Paul Edwards | Steven Maeda & Craig Wright | Kate | November 30, 2005 (2005-11-30) | 21.54 |
| 35 | 10 | "The 23rd Psalm" | Matt Earl Beesley | Carlton Cuse & Damon Lindelof | Mr. Eko | January 11, 2006 (2006-01-11) | 20.56 |
| 36 | 11 | "The Hunting Party" | Stephen Williams | Elizabeth Sarnoff & Christina M. Kim | Jack | January 18, 2006 (2006-01-18) | 19.13 |
| 37 | 12 | "Fire + Water" | Jack Bender | Edward Kitsis & Adam Horowitz | Charlie | January 25, 2006 (2006-01-25) | 19.05 |
| 38 | 13 | "The Long Con" | Roxann Dawson | Steven Maeda & Leonard Dick | Sawyer | February 8, 2006 (2006-02-08) | 18.74 |
| 39 | 14 | "One of Them" | Stephen Williams | Damon Lindelof & Carlton Cuse | Sayid | February 15, 2006 (2006-02-15) | 18.20 |
| 40 | 15 | "Maternity Leave" | Jack Bender | Dawn Lambertsen Kelly & Matt Ragghianti | Claire | March 1, 2006 (2006-03-01) | 16.43 |
| 41 | 16 | "The Whole Truth" | Karen Gaviola | Elizabeth Sarnoff & Christina M. Kim | Sun | March 22, 2006 (2006-03-22) | 15.30 |
| 42 | 17 | "Lockdown" | Stephen Williams | Carlton Cuse & Damon Lindelof | Locke | March 29, 2006 (2006-03-29) | 16.21 |
| 43 | 18 | "Dave" | Jack Bender | Edward Kitsis & Adam Horowitz | Hurley | April 5, 2006 (2006-04-05) | 16.38 |
| 44 | 19 | "S.O.S." | Eric Laneuville | Steven Maeda & Leonard Dick | Rose & Bernard | April 12, 2006 (2006-04-12) | 15.68 |
| 45 | 20 | "Two for the Road" | Paul Edwards | Elizabeth Sarnoff & Christina M. Kim | Ana Lucia | May 3, 2006 (2006-05-03) | 15.56 |
| 46 | 21 | "?" | Deran Sarafian | Damon Lindelof & Carlton Cuse | Mr. Eko | May 10, 2006 (2006-05-10) | 16.35 |
| 47 | 22 | "Three Minutes" | Stephen Williams | Edward Kitsis & Adam Horowitz | Michael | May 17, 2006 (2006-05-17) | 14.67 |
| 4849 | 2324 | "Live Together, Die Alone" | Jack Bender | Carlton Cuse & Damon Lindelof | Desmond | May 24, 2006 (2006-05-24) | 17.84 |

### Season 3 (2006–07)

Season three began airing on October 4, 2006, and ended on May 23, 2007. There were twenty-two episodes aired in two blocks. The first block consisted of six episodes and aired for six consecutive weeks. After a twelve-week break, the second block aired, and featured the remaining sixteen episodes. In addition to the twenty-two regular season episodes, two specials were aired. "Lost: A Tale of Survival" aired a week before the premiere, and "The Lost Survivor Guide" aired with episode seven, when the season returned from its twelve-week break.

Harold Perrineau Jr., Maggie Grace, Michelle Rodriguez, and Cynthia Watros, who played Michael, Shannon, Ana Lucia, and Libby, respectively, left the show after the second season. Michael Emerson, as Benjamin Linus (aka "Henry Gale"), and Henry Ian Cusick, as Desmond, became regular cast members in season three. Elizabeth Mitchell joined the main cast as Juliet, as did Kiele Sanchez and Rodrigo Santoro as previously unseen crash survivors Nikki and Paulo respectively.

Season three continues the story 67 days after the crash. The season begins where the second season left off: three of the crash survivors are held in captivity by the mysterious Others. More backstory on the Others, as well as the Dharma Initiative, is revealed. The survivors face continuous threats from their enemies, and also from their friends. The survivors attempt to make contact with a freighter which they believe is there to rescue them. Season three takes place over 24 days.

The third season averaged a total of 17.84 million viewers. The average of the live ratings presented below for season three is 13.74 million viewers per episode.

| No. overall | No. in season | Title | Directed by | Written by | Featured character(s) | Original air date | U.S. viewers (millions) |
| - | - | - | - | - | - | - | - |
| 50 | 1 | "A Tale of Two Cities" | Jack Bender | Story by : Damon Lindelof Teleplay by : J. J. Abrams & Damon Lindelof | Jack | October 4, 2006 (2006-10-04) | 18.82 |
| 51 | 2 | "The Glass Ballerina" | Paul Edwards | Jeff Pinkner & Drew Goddard | Sun & Jin | October 11, 2006 (2006-10-11) | 16.89 |
| 52 | 3 | "Further Instructions" | Stephen Williams | Carlton Cuse & Elizabeth Sarnoff | Locke | October 18, 2006 (2006-10-18) | 16.31 |
| 53 | 4 | "Every Man for Himself" | Stephen Williams | Edward Kitsis & Adam Horowitz | Sawyer | October 25, 2006 (2006-10-25) | 17.09 |
| 54 | 5 | "The Cost of Living" | Jack Bender | Alison Schapker & Monica Owusu-Breen | Mr. Eko | November 1, 2006 (2006-11-01) | 16.07 |
| 55 | 6 | "I Do" | Tucker Gates | Damon Lindelof & Carlton Cuse | Kate | November 8, 2006 (2006-11-08) | 17.15 |
| 56 | 7 | "Not in Portland" | Stephen Williams | Carlton Cuse & Jeff Pinkner | Juliet | February 7, 2007 (2007-02-07) | 14.49 |
| 57 | 8 | "Flashes Before Your Eyes" | Jack Bender | Damon Lindelof & Drew Goddard | Desmond | February 14, 2007 (2007-02-14) | 12.84 |
| 58 | 9 | "Stranger in a Strange Land" | Paris Barclay | Elizabeth Sarnoff & Christina M. Kim | Jack | February 21, 2007 (2007-02-21) | 12.95 |
| 59 | 10 | "Tricia Tanaka Is Dead" | Eric Laneuville | Edward Kitsis & Adam Horowitz | Hurley | February 28, 2007 (2007-02-28) | 12.78 |
| 60 | 11 | "Enter 77" | Stephen Williams | Carlton Cuse & Damon Lindelof | Sayid | March 7, 2007 (2007-03-07) | 12.45 |
| 61 | 12 | "Par Avion" | Paul Edwards | Christina M. Kim & Jordan Rosenberg | Claire | March 14, 2007 (2007-03-14) | 12.48 |
| 62 | 13 | "The Man from Tallahassee" | Jack Bender | Drew Goddard & Jeff Pinkner | Locke | March 21, 2007 (2007-03-21) | 12.22 |
| 63 | 14 | "Exposé" | Stephen Williams | Edward Kitsis & Adam Horowitz | Nikki & Paulo | March 28, 2007 (2007-03-28) | 11.52 |
| 64 | 15 | "Left Behind" | Karen Gaviola | Damon Lindelof & Elizabeth Sarnoff | Kate | April 4, 2007 (2007-04-04) | 11.66 |
| 65 | 16 | "One of Us" | Jack Bender | Carlton Cuse & Drew Goddard | Juliet | April 11, 2007 (2007-04-11) | 12.09 |
| 66 | 17 | "Catch-22" | Stephen Williams | Jeff Pinkner & Brian K. Vaughan | Desmond | April 18, 2007 (2007-04-18) | 12.08 |
| 67 | 18 | "D.O.C." | Frederick E.O. Toye | Edward Kitsis & Adam Horowitz | Sun | April 25, 2007 (2007-04-25) | 11.86 |
| 68 | 19 | "The Brig" | Eric Laneuville | Damon Lindelof & Carlton Cuse | Locke | May 2, 2007 (2007-05-02) | 12.33 |
| 69 | 20 | "The Man Behind the Curtain" | Bobby Roth | Elizabeth Sarnoff & Drew Goddard | Ben | May 9, 2007 (2007-05-09) | 12.11 |
| 70 | 21 | "Greatest Hits" | Stephen Williams | Edward Kitsis & Adam Horowitz | Charlie | May 16, 2007 (2007-05-16) | 12.32 |
| 71 | 22 | "Through the Looking Glass" | Jack Bender | Carlton Cuse & Damon Lindelof | Jack | May 23, 2007 (2007-05-23) | 13.86 |
| 72 | 23 | "Through the Looking Glass" | Jack Bender | Carlton Cuse & Damon Lindelof | Jack | May 23, 2007 (2007-05-23) | 13.86 |

### Season 4 (2008)

Season four began airing on January 31, 2008, and concluded on May 29, 2008. Production began in August 2007 and was prematurely stopped in November 2007 due to the 2007–2008 Writers Guild of America strike. The original plan was to air all sixteen episodes in one consecutive block, uninterrupted by repeats. After the strike was resolved, it was decided that the remaining story for the season would be condensed into what co-creator Damon Lindelof called a "lean, mean five". This would include a three-hour finale, after Lindelof and Carlton Cuse petitioned ABC. Due to the time lost to the strike there was a mini-hiatus after the eighth episode had aired. The series resumed with its post-strike episodes on April 24, 2008.

Adewale Akinnuoye-Agbaje, Dominic Monaghan, and Kiele Sanchez and Rodrigo Santoro, who played Mr. Eko, Charlie, and Nikki and Paulo, respectively, left the cast during the third season, and Harold Perrineau rejoined the main cast as Michael. Alongside Perrineau, three new actors joined the main cast. Jeremy Davies, Ken Leung, and Rebecca Mader play Daniel Faraday, Miles Straume, and Charlotte Lewis respectively.

Season 4 continues the story 91 days after the crash. The season focuses on the survivors splitting into two groups, after making contact with a freighter off-shore. Throughout the season, flashforwards show the lives of the "Oceanic Six", five original survivors and Aaron who make it off the island and have returned to their old lives. The season takes place over 17 days.

The fourth season averaged a total of 13.40 million viewers. The average of the live ratings presented below for season four is 12.73 million viewers per episode.

| No. overall | No. in season | Title | Directed by | Written by | Featured character(s) | Original air date | U.S. viewers (millions) |
| - | - | - | - | - | - | - | - |
| 73 | 1 | "The Beginning of the End" | Jack Bender | Damon Lindelof & Carlton Cuse | Hurley | January 31, 2008 (2008-01-31) | 16.07 |
| 74 | 2 | "Confirmed Dead" | Stephen Williams | Drew Goddard & Brian K. Vaughan | Faraday, Charlotte, Miles, Frank | February 7, 2008 (2008-02-07) | 15.06 |
| 75 | 3 | "The Economist" | Jack Bender | Edward Kitsis & Adam Horowitz | Sayid | February 14, 2008 (2008-02-14) | 13.62 |
| 76 | 4 | "Eggtown" | Stephen Williams | Elizabeth Sarnoff & Greggory Nations | Kate | February 21, 2008 (2008-02-21) | 13.53 |
| 77 | 5 | "The Constant" | Jack Bender | Carlton Cuse & Damon Lindelof | Desmond | February 28, 2008 (2008-02-28) | 12.85 |
| 78 | 6 | "The Other Woman" | Eric Laneuville | Drew Goddard & Christina M. Kim | Juliet | March 6, 2008 (2008-03-06) | 12.90 |
| 79 | 7 | "Ji Yeon" | Stephen Semel | Edward Kitsis & Adam Horowitz | Sun & Jin | March 13, 2008 (2008-03-13) | 11.87 |
| 80 | 8 | "Meet Kevin Johnson" | Stephen Williams | Elizabeth Sarnoff & Brian K. Vaughan | Michael | March 20, 2008 (2008-03-20) | 11.28 |
| 81 | 9 | "The Shape of Things to Come" | Jack Bender | Brian K. Vaughan & Drew Goddard | Ben | April 24, 2008 (2008-04-24) | 12.33 |
| 82 | 10 | "Something Nice Back Home" | Stephen Williams | Edward Kitsis & Adam Horowitz | Jack | May 1, 2008 (2008-05-01) | 11.14 |
| 83 | 11 | "Cabin Fever" | Paul Edwards | Elizabeth Sarnoff & Kyle Pennington | Locke | May 8, 2008 (2008-05-08) | 11.28 |
| 84 | 12 | "There's No Place Like Home (Part 1)" | Stephen Williams | Damon Lindelof & Carlton Cuse | Jack, Hurley, Sayid, Sun, Kate | May 15, 2008 (2008-05-15) | 11.40 |
| 85 | 13 | "There's No Place Like Home (Parts 2 & 3)" | Jack Bender | Carlton Cuse & Damon Lindelof | Jack, Hurley, Sayid, Sun, Kate | May 29, 2008 (2008-05-29) | 12.20 |
| 86 | 14 | "There's No Place Like Home (Parts 2 & 3)" | Jack Bender | Carlton Cuse & Damon Lindelof | Jack, Hurley, Sayid, Sun, Kate | May 29, 2008 (2008-05-29) | 12.20 |

### Season 5 (2009)

Season five began airing on January 21, 2009, and ended on May 13, 2009, featuring seventeen episodes. A clip show recapping the first four seasons preceded the premiere. Season five follows two time lines. The first takes place on the island, where the remaining survivors begin to erratically jump forward and backward through time, following the island being moved in both space and time by Ben, and focuses on the events that lead up to Locke stopping the time jumps and leaving the Island. The second takes place off the island following Locke's death and deals with Jack and Ben's attempt to reunite the Oceanic Six and return to the island with Locke's dead body. The second part of the season starts after the time jumps end and the Oceanic Six return to the island on Ajira Airways Flight 316. The show continues to follow two time lines, both of which take place on the island. The first takes place in 1977 when the survivors who had been left behind are stranded after jumping around in time. It is also where some of the Oceanic Six are transported during the return flight to the island. The second takes place in late 2007 after Flight 316 is forced to crash land on the island.

Harold Perrineau, who plays Michael Dawson, left the cast at the conclusion of the fourth season. Emilie de Ravin, who plays Claire Littleton, was placed on a holding contract, but she returned in the sixth and final season of Lost as a main cast member.

The fifth season averaged a total of 10.94 million viewers. The average of the live ratings presented below for season five is 9.89 million viewers per episode.

| No. overall | No. in season | Title | Directed by | Written by | Featured character(s) | Original air date | U.S. viewers (millions) |
| - | - | - | - | - | - | - | - |
| 87 | 1 | "Because You Left" | Stephen Williams | Damon Lindelof & Carlton Cuse | none | January 21, 2009 (2009-01-21) | 11.66 |
| 88 | 2 | "The Lie" | Jack Bender | Edward Kitsis & Adam Horowitz | Hurley | January 21, 2009 (2009-01-21) | 11.08 |
| 89 | 3 | "Jughead" | Rod Holcomb | Elizabeth Sarnoff & Paul Zbyszewski | Desmond | January 28, 2009 (2009-01-28) | 11.07 |
| 90 | 4 | "The Little Prince" | Stephen Williams | Brian K. Vaughan & Melinda Hsu Taylor | Kate | February 4, 2009 (2009-02-04) | 10.98 |
| 91 | 5 | "This Place Is Death" | Paul Edwards | Edward Kitsis & Adam Horowitz | Sun & Jin | February 11, 2009 (2009-02-11) | 9.77 |
| 92 | 6 | "316" | Stephen Williams | Damon Lindelof & Carlton Cuse | Jack | February 18, 2009 (2009-02-18) | 11.27 |
| 93 | 7 | "The Life and Death of Jeremy Bentham" | Jack Bender | Carlton Cuse & Damon Lindelof | Locke | February 25, 2009 (2009-02-25) | 9.82 |
| 94 | 8 | "LaFleur" | Mark Goldman | Elizabeth Sarnoff & Kyle Pennington | Sawyer | March 4, 2009 (2009-03-04) | 10.61 |
| 95 | 9 | "Namaste" | Jack Bender | Paul Zbyszewski & Brian K. Vaughan | none | March 18, 2009 (2009-03-18) | 9.08 |
| 96 | 10 | "He's Our You" | Greg Yaitanes | Edward Kitsis & Adam Horowitz | Sayid | March 25, 2009 (2009-03-25) | 8.82 |
| 97 | 11 | "Whatever Happened, Happened" | Bobby Roth | Carlton Cuse & Damon Lindelof | Kate | April 1, 2009 (2009-04-01) | 9.35 |
| 98 | 12 | "Dead Is Dead" | Stephen Williams | Brian K. Vaughan & Elizabeth Sarnoff | Ben | April 8, 2009 (2009-04-08) | 8.29 |
| 99 | 13 | "Some Like It Hoth" | Jack Bender | Melinda Hsu Taylor & Greggory Nations | Miles | April 15, 2009 (2009-04-15) | 9.23 |
| 100 | 14 | "The Variable" | Paul Edwards | Edward Kitsis & Adam Horowitz | Faraday | April 29, 2009 (2009-04-29) | 9.04 |
| 101 | 15 | "Follow the Leader" | Stephen Williams | Paul Zbyszewski & Elizabeth Sarnoff | none | May 6, 2009 (2009-05-06) | 8.70 |
| 102 | 16 | "The Incident" | Jack Bender | Damon Lindelof & Carlton Cuse | Jacob | May 13, 2009 (2009-05-13) | 9.43 |
| 103 | 17 | "The Incident" | Jack Bender | Damon Lindelof & Carlton Cuse | Jacob | May 13, 2009 (2009-05-13) | 9.43 |

### Season 6 (2010)

The sixth and final season premiered on February 2, 2010, with a two-hour premiere preceded by a one-hour clip show. The show continued from February 9, 2010, at its new time slot of Tuesdays at 9:00 pm with a total of 18 episodes airing in 16 broadcasts, and ended with a four-and-a-half-hour series finale on Sunday, May 23, 2010. The finale began with a two-hour recap special, and continued with the two-and-a-half-hour final episode.

This season introduced "flash-sideways." It represents a world created by the collective minds of the Oceanic 815 survivors for their souls to find one another in the afterlife and to remember their previous lives together, as revealed in the finale.

Jeremy Davies, Rebecca Mader, and Elizabeth Mitchell, who played Daniel Faraday, Charlotte Lewis, and Juliet Burke, respectively, left the show after the fifth season, but all three reprised their characters for the sixth. Former recurring cast members Nestor Carbonell, Jeff Fahey, and Zuleikha Robinson, who played the roles Richard Alpert, Frank Lapidus, and Ilana Verdansky, were promoted to the starring cast, and Emilie de Ravin returned as main character Claire Littleton after a year-long absence.

Multiple former and recurring cast members made an appearance in the final episode. For the special occasion, Sam Anderson, François Chau, L. Scott Caldwell, Jeremy Davies, Fionnula Flanagan, Maggie Grace, Rebecca Mader, Elizabeth Mitchell, Dominic Monaghan, Ian Somerhalder, John Terry, Sonya Walger, and Cynthia Watros were listed in the starring cast.

The sixth season totals an average of 10.08 million viewers. The average of the live ratings presented below for season six is 10.16 million viewers per episode.

| No. overall | No. in season | Title | Directed by | Written by | Featured character(s) | Original air date | U.S. viewers (millions) |
| - | - | - | - | - | - | - | - |
| 104105 | 12 | "LA X" | Jack Bender | Damon Lindelof & Carlton Cuse | various | February 2, 2010 (2010-02-02) | 12.09 |
| 106 | 3 | "What Kate Does" | Paul Edwards | Edward Kitsis & Adam Horowitz | Kate | February 9, 2010 (2010-02-09) | 11.05 |
| 107 | 4 | "The Substitute" | Tucker Gates | Elizabeth Sarnoff & Melinda Hsu Taylor | Locke | February 16, 2010 (2010-02-16) | 9.82 |
| 108 | 5 | "Lighthouse" | Jack Bender | Carlton Cuse & Damon Lindelof | Jack | February 23, 2010 (2010-02-23) | 9.95 |
| 109 | 6 | "Sundown" | Bobby Roth | Paul Zbyszewski & Graham Roland | Sayid | March 2, 2010 (2010-03-02) | 9.29 |
| 110 | 7 | "Dr. Linus" | Mario Van Peebles | Edward Kitsis & Adam Horowitz | Ben | March 9, 2010 (2010-03-09) | 9.49 |
| 111 | 8 | "Recon" | Jack Bender | Elizabeth Sarnoff & Jim Galasso | Sawyer | March 16, 2010 (2010-03-16) | 8.87 |
| 112 | 9 | "Ab Aeterno" | Tucker Gates | Melinda Hsu Taylor & Greggory Nations | Richard | March 23, 2010 (2010-03-23) | 9.31 |
| 113 | 10 | "The Package" | Paul Edwards | Paul Zbyszewski & Graham Roland | Sun & Jin | March 30, 2010 (2010-03-30) | 10.13 |
| 114 | 11 | "Happily Ever After" | Jack Bender | Carlton Cuse & Damon Lindelof | Desmond | April 6, 2010 (2010-04-06) | 9.55 |
| 115 | 12 | "Everybody Loves Hugo" | Daniel Attias | Edward Kitsis & Adam Horowitz | Hurley | April 13, 2010 (2010-04-13) | 9.48 |
| 116 | 13 | "The Last Recruit" | Stephen Semel | Paul Zbyszewski & Graham Roland | various | April 20, 2010 (2010-04-20) | 9.53 |
| 117 | 14 | "The Candidate" | Jack Bender | Elizabeth Sarnoff & Jim Galasso | Jack & Locke | May 4, 2010 (2010-05-04) | 9.59 |
| 118 | 15 | "Across the Sea" | Tucker Gates | Carlton Cuse & Damon Lindelof | Jacob & Man in Black | May 11, 2010 (2010-05-11) | 10.32 |
| 119 | 16 | "What They Died For" | Paul Edwards | Edward Kitsis & Adam Horowitz & Elizabeth Sarnoff | various | May 18, 2010 (2010-05-18) | 10.47 |
| 120121 | 1718 | "The End" | Jack Bender | Damon Lindelof & Carlton Cuse | various | May 23, 2010 (2010-05-23) | 13.57 |

## Specials

### Epilogue

| Title | Directed by | Written by | Featured character(s) | Original air date |
| - | - | - | - | - |
| "The New Man in Charge" | Paul Edwards | Melinda Hsu Taylor, Graham Roland & Jim Galasso | Hurley, Ben & Walt | August 24, 2010 (2010-08-24) (on DVD) |
| Following the events of the series finale, Ben relieves two Dharma Initiative employees of their duties before answering a few lingering questions. Afterwards, Ben recruits an old friend to rejoin him on the island. |||||

### Mobisodes: Lost: Missing Pieces

Lost: Missing Pieces consists of thirteen original two- to three-minute clips referred to as "mobisodes" which were produced for cell phones and released between seasons three and four. Six days after they became available for cell phones, they could be streamed from ABC.com. "Prod. no." stands for production code number, which indicates in what order the mobisodes were produced, and in the order they appear on the DVD and Blu-ray.

| No. | Title | Directed by | Written by | Featured character(s) | Original air date | Prod. code |
| - | - | - | - | - | - | - |
| 1 | "The Watch" | Jack Bender | Carlton Cuse | Jack & Christian | November 7, 2007 (2007-11-07) | 107 |
| 2 | "The Adventures of Hurley and Frogurt" | Jack Bender | Edward Kitsis & Adam Horowitz | Hurley & Frogurt | November 13, 2007 (2007-11-13) | 103 |
| 3 | "King of the Castle" | Jack Bender | Brian K. Vaughan | Jack & Ben | November 20, 2007 (2007-11-20) | 101 |
| 4 | "The Deal" | Jack Bender | Elizabeth Sarnoff | Michael & Juliet | November 26, 2007 (2007-11-26) | 110 |
| 5 | "Operation: Sleeper" | Jack Bender | Brian K. Vaughan | Jack & Juliet | December 3, 2007 (2007-12-03) | 106 |
| 6 | "Room 23" | Jack Bender | Elizabeth Sarnoff | Ben & Juliet | December 11, 2007 (2007-12-11) | 104 |
| 7 | "Arzt & Crafts" | Jack Bender | Damon Lindelof | Hurley, Jin, Sun, Michael & Arzt | December 17, 2007 (2007-12-17) | 112 |
| 8 | "Buried Secrets" | Jack Bender | Christina M. Kim | Jin, Sun & Michael | December 24, 2007 (2007-12-24) | 105 |
| 9 | "Tropical Depression" | Jack Bender | Carlton Cuse | Michael & Arzt | December 31, 2007 (2007-12-31) | 111 |
| 10 | "Jack, Meet Ethan. Ethan? Jack." | Jack Bender | Damon Lindelof | Jack & Ethan | January 7, 2008 (2008-01-07) | 102 |
| 11 | "Jin Has a Temper-Tantrum on the Golf Course" | Jack Bender | Drew Goddard | Hurley, Jin & Michael | January 14, 2008 (2008-01-14) | 108 |
| 12 | "The Envelope" | Jack Bender | Story by : Damon Lindelof Teleplay by : J. J. Abrams & Damon Lindelof | Juliet & Amelia | January 21, 2008 (2008-01-21) | 109 |
| 13 | "So It Begins" | Jack Bender | Drew Goddard | Jack, Christian & Vincent | January 28, 2008 (2008-01-28) | 113 |

### Recap specials

This section indexes official specials and recap episodes that were made specifically by the Lost team. Technically, these episodes are clip shows, but to distance them from the negative stereotypes clip shows receive, they are described as recap specials.

| No. | Title | Narrated by | Aired between | Original air date | U.S. viewers (millions) |
| - | - | - | - | - | - |
| 1 | "Lost: The Journey" | Brian Cox Evangeline Lilly & Dominic Monaghan in Australia | "Do No Harm" "The Greater Good" | April 27, 2005 (2005-04-27) | 13.75 |
| 2 | "Destination Lost" | Peter Coyote | "Exodus" "Man of Science, Man of Faith" | September 21, 2005 (2005-09-21) | 15.27 |
| 3 | "Lost: Revelation" | Peter Coyote Hosted by J. J. Abrams in Australia | "What Kate Did" "The 23rd Psalm" | January 11, 2006 (2006-01-11) | 13.52 |
| 4 | "Lost: Reckoning" | Peter Coyote | "S.O.S." "Two for the Road" | April 26, 2006 (2006-04-26) | 11.95 |
| 5 | "Lost: A Tale of Survival" | Michael Emerson | "Live Together, Die Alone" "A Tale of Two Cities" | September 27, 2006 (2006-09-27) | 9.03 |
| 6 | "Lost Survivor Guide" | Kyle MacLachlan Hosted by Damon Lindelof & Carlton Cuse | "I Do" "Not in Portland" | February 7, 2007 (2007-02-07) | 8.84 |
| 7 | "Lost: The Answers" | Kyle MacLachlan Hosted by Damon Lindelof & Carlton Cuse | "Greatest Hits" "Through the Looking Glass" | May 17, 2007 (2007-05-17) | 9.12 |
| 8 | "Lost: Past, Present & Future" | Michael Emerson | "Through the Looking Glass" "The Beginning of the End" | January 31, 2008 (2008-01-31) | 13.06 |
| 9 | "Lost: Destiny Calls" | Doug Hutchison Hosted by Damon Lindelof & Carlton Cuse | "There's No Place Like Home" "Because You Left" | January 21, 2009 (2009-01-21) | 8.48 |
| 10 | "Lost: The Story of the Oceanic 6" | Nestor Carbonell | "Some Like It Hoth" "The Variable" | April 22, 2009 (2009-04-22) | 6.75 |
| 11 | "Lost: A Journey in Time" | Michael Emerson Hosted by Damon Lindelof & Carlton Cuse | "Follow the Leader" "The Incident" | May 13, 2009 (2009-05-13) | 6.33 |
| 12 | "Lost: Final Chapter" "Lost: Beginning of the End" | Michael Emerson | "The Incident" "LA X" | February 2, 2010 (2010-02-02) | 9.97 |
| 13–14 | "Lost: The Final Journey" | Titus Welliver | "What They Died For" "The End" | May 23, 2010 (2010-05-23) | 9.93 |
