Sine Qua Non

Battlestar Galactica

S04E08
E8
May 30, 2008 ★ 7.4 44 min

Overview

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.

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Top Cast

Edward James Olmos

Edward James Olmos

Commander William Adama
Mary McDonnell

Mary McDonnell

Laura Roslin
Jamie Bamber

Jamie Bamber

Lee 'Apollo' Adama
Katee Sackhoff

Katee Sackhoff

Kara 'Starbuck' Thrace
James Callis

James Callis

Gaius Baltar
Tricia Helfer

Tricia Helfer

Number Six
Tahmoh Penikett

Tahmoh Penikett

Karl 'Helo' Agathon
Grace Park

Grace Park

Sharon 'Boomer' Valerii
Michael Hogan

Michael Hogan

Saul Tigh
Aaron Douglas

Aaron Douglas

Galen Tyrol

Guest Stars

Kate Vernon

Kate Vernon

Ellen Tigh
Rekha Sharma

Rekha Sharma

Tory Foster
Laara Sadiq

Laara Sadiq

Priestess
Ryan McDonell

Ryan McDonell

Lt. Eammon 'Gonzo' Pike
Richard Hatch

Richard Hatch

Tom Zarek
Kandyse McClure

Kandyse McClure

Lt. Anastasia Dualla