In the aftermath of President Roslin’s abduction, a bitter power struggle erupts which threatens to tear the once-ordered world of the colonial fleet apart.

Watch Battlestar Galactica: Season Four, Episode Eight. Sine Qua Non.

• Battlestar Galactica: Season 4, Episode 8 – Link 1
• Battlestar Galactica: Season 4, Episode 8 – Link 2

Starring: Edward James Olmos, Grace Park, James Callis, Jamie Bamber, Katee Sackhoff, Mary McDonnell, Tricia Helfer

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Related Information

• TV Network - Sci-fi Channel
• Aired On - May 30, 2008
• View all Episodes of - Battlestar Galactica