Battlestar Galactica - Season 3 - Eps 7: A Measure of Salvation
Apollo formulates a plan that threatens the very existence of the Cylon culture. Adama and Roslin must decide whether to follow through on the plan to use a biological weapon against the Cylons. D'Anna Biers (Number Three) believes Baltar knows who created the virus that infected and disabled the Cylon baseship. She is willing to take extreme measures to learn the truth.
About Battlestar Galactica

Title: Battlestar Galactica
First Air Date: 2004-10-18
Last Air Date: 2009-03-20
Status: Ended
Rating: 8.2/10 (from 1582 votes)
Language: EN
Seasons: 5
Total Episodes: 73
Network: Syfy
Genres: Sci-Fi & Fantasy, Action & Adventure, Drama
Production Companies: David Eick Productions, R&D TV, Universal Television, Universal Media Studios, UCP
Synopsis
When an old enemy, the Cylons, resurface and obliterate the 12 colonies, the crew of the aged Galactica protect a small civilian fleet - the last of humanity - as they journey toward the fabled 13th colony, Earth.
Cast

Edward James Olmos
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