View source for Season 4 (2008-09)

== Notes==
* Moore indicates that this season begins the "third act in the three-act structure where we're all moving towards the finale and the climax of all these different plot lines. In my head there's two chapters to go in the story and those can be of varying lengths." <ref name="mtv">{{cite_web|url=http://www.mtv.com/movies/news/articles/1556508/story.jhtml|title=MTV Movie News: 'Battlestar Galactica' Producer Talks Movie(s?), Possible Conclusion|date=6 April 2007|accessdate=8 April 2007|last=Jacks|first=Brian|format=|language=}}</ref>
* On Friday, June 1st 2007 the SciFi Channel issued a statement saying that Season 4 is going to be the final season. Ending the series with the upcoming 22-episode fourth season was a creative decision made by the show's executive producers [[Ronald D. Moore]] and [[David Eick]]. SciFi executive VP of original programming Mark Stern said the channel's brass "respect the producers' decision to end the series." <ref name="bsgending">{{cite_web|url=http://www.scifi.com/scifiwire/index.php?category=0&id=41709&type=0|title=SciFi Wire: Battlestar Ending Next Season|date=|accessdate=1 June 2007|last=|first=|format=|language=}}</ref>
*Production of Season 4 was preempted by the [[WGA strike|2007-2008 Writers Strike]], which forced production to shut down after production of the episode "[[Sometimes a Great Notion]]". Production resumed on Season 4 following the conclusion of the strike, but as a result, just as with Season 2, the season was split into two widely-space halves (effectively making Season 4 two separate seasons, with the second half becoming known as Season 4.5). The first half of Season 4 began airing in the spring of 2008; the second half began in January 2009 <ref name ="watcherjuly2008">{{cite_web|url=http://featuresblogs.chicagotribune.com/entertainment_tv/2008/07/talking-battles.html|title=Talking 'Battlestar Galactica's' finale, 'Caprica' and the 'Battlestar' TV movie with Ron Moore|date=|accessdate=}}</ref>. The final episode of the series will air in March 2009.
* A series of 10 webisodes, written by [[Jane Espenson]] and [[Seamus Kevin Fahey]] and entitled "[[The Face of the Enemy]]," were webcast prior to the broadcast of the  Season 4.5 premiere episode.<ref name ="watcherjuly2008"/>.
* Moore made his directorial debut in the second half of this season with episode 12, "[[A Disquiet Follows My Soul]]".<ref name="verheiden">{{cite_web|url=http://verheiden.blogspot.com/2008/03/battlestar-rolls-on-tuesday.html|title=Battlestar Rolls On Tuesday...|date=24 March 2008|accessdate=3 April 2008|last=Verheiden|first=Mark|format=|language=}}</ref>
*The final number of survivors that make it to the new Earth, around 38,000, is stated by Bill Adama during the second hour of [[Daybreak, Part II]].