text: 2005–2011 Upon the revival of Doctor Who, Christopher Eccleston would be the first actor to portray the newest incarnation of the Doctor. Multiple actresses were considered to play the Doctor's next companion, with Billie Piper announced as the frontrunner to star as Rose Taylor. The role ultimately went to Piper, with the characters name changed to Rose Tyler. Eccleston and Piper made their debut in "Rose." For the second half of the first series they were joined by John Barrowman as Captain Jack Harkness. Due to disagreements with the producers and network executives, Eccleston departed after a single series and was succeeded by David Tennant portraying the Tenth Doctor beginning at the end of "The Parting of the Ways." Barrowman was also written off at the end of this series and would go on to lead his own spin-off series, Torchwood. Tennant's first full episode was "The Christmas Invasion" which led into the second series with Piper continuing her role. Elisabeth Sladen and John Leeson returned to Doctor Who in the series two episode "School Reunion" reprising their roles as Sarah Jane Smith and K-9, respectively. The two would also go on to star in their own spin-off, The Sarah Jane Adventures. Piper left in the second series finale, "Doomsday." Catherine Tate starred as Donna Noble, the Doctor's one off companion in "The Runaway Bride", and was briefly introduced in "Doomsday." Freema Agyeman replaced Piper for the series three, and appeared as Martha Jones from "Smith and Jones" to "Last of the Time Lords." Agyeman had previously appeared in a separate role in "Doomsday" and  was cast as Jones following positive reception from the producers; the two characters were later explained to be cousins. Barrowman briefly re-joined the series for its three-part finale third series. Derek Jacobi and John Simm portrayed new incarnations of the Master.