text: On May 13, 2010, it was announced that Chuck had been renewed by NBC for a fourth season. The season received a 13-episode order with an option of an additional nine episodes. The fourth season premiered during NBC's fall 2010 schedule. It retained its current timeslot. The premiere episode of the fourth season was titled "Chuck Versus the Anniversary", and aired on September 20. Season four guest starred Linda Hamilton, Dolph Lundgren, Harry Dean Stanton, Olivia Munn, Steve Austin, Dave Batista, Summer Glau, Timothy Dalton and Eric Roberts. It was announced on October 19, 2010, that NBC had ordered an additional 11 episodes of Chuck, bringing the episode total for Season 4 to 24.
  Speculating on the possibility of a fifth season, Yvonne Strahovski (Sarah Walker) commented that she felt "...[the chances] are pretty good, I will be surprised if we don't get a season five." Her co-star Adam Baldwin (John Casey) concurred.
  Series renewal, 2011
  It was announced on May 13, 2011, that Chuck would be renewed for a fifth, and final, season consisting of thirteen episodes, set to premiere on October 21, 2011. The show was moved from Monday and aired on Friday nights, in what some consider to be a Friday night death slot. The premiere was later pushed a week later to October 28.
  Broadcast and distribution