Sine Qua Non
Battlestar Galactica – Season 4
With President Roslin missing along with the cylon base ship a new president must be decided on. Galactica goes on a search for the missing base ship and the Galactica crew members that were on board.
Cast
Edward James Olmos
Commander William Adama
Mary McDonnell
Laura Roslin
Jamie Bamber
Lee 'Apollo' Adama
Katee Sackhoff
Kara 'Starbuck' Thrace
James Callis
Gaius Baltar
Tricia Helfer
Number Six
Tahmoh Penikett
Karl 'Helo' Agathon
Grace Park
Sharon 'Boomer' Valerii
Michael Hogan
Saul Tigh
Aaron Douglas
Galen Tyrol
Kate Vernon
Ellen Tigh
Rekha Sharma
Tory Foster
Laara Sadiq
Priestess
Ryan McDonell
Lt. Eammon 'Gonzo' Pike
Richard Hatch
Tom Zarek
Kandyse McClure
Lt. Anastasia Dualla
Donna Soares
Geminon Delegate
Alexandra Thomas
Hera Agathon
Andrew McIlroy
Jacob Cantrell
Judith Maxie
Picon Delegate
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