Miniseries: Dec. 8 - 9, 2003
[downtime: 13 months, 5 days]
Season 1: Jan. 14 - April 1, 2005
[downtime: 3 months, 14 days]
Season 2, part one: July 15 - Sept. 23, 2005
[downtime: 3 months, 14 days]
Season 2, part two: Jan. 6 - March 3, 2006
[downtime: 1 month, 7 days]
Season 2, part three: April 10, 2006
[downtime: 4 months, 25 days]
Resistance webisodes: Sept. 5 - Oct. 5, 2006
[downtime: 1 day]
Season 3, part one: Oct. 6 - Nov. 17, 2006
[downtime: 14 days]
Season 3, part two: Dec. 1 - Dec. 15, 2006
[downtime: 1 month, 6 days]
Season 3, part three: Jan. 21 - Jan. 28, 2007
[downtime: 14 days]
Season 3, part four: Feb. 11 - March 25, 2007
[downtime: 7 months, 30 days]
Razor movie: Nov. 24, 2007
[downtime: 4 months, 10 days]
Season 4, part one: April 4, 2008 - June 13, 2008
[downtime: 5 months, 29 days]
Face of the Enemy Webisodes: Dec. 12, 2008 - Jan. 12, 2009
[downtime: 4 days]
Season 4, part two: Jan. 16, 2009 - March 20, 2009
[downtime: 1 month, 1 day / 9 months, 11 days until next airing]
The Plan movie: Jan. 10, 2010