Following a firefight with Cylon Centurions and the death of her spiritual advisor Elosha, President Roslin (Mary McDonnell) treks onward with her confederates in search of the Tomb of Athena. Heavy rain and Kobol's rugged terrain make the journey difficult for all except the tireless Sharon (Grace Park). Tom Zarek (Richard Hatch) again butts heads with Lee Adama (Jamie Bamber), inspiring Zarek's henchman Meier (James Remar) to consider drastic measures that will clear the path to power for his old friend. Meanwhile, aboard the Galactica, Gaius Baltar (James Callis) questions his sanity as Number Six (Tricia Helfer) toys with him, and Commander Adama (Edward James Olmos) mounts a rescue mission to Kobol. Adama enlists presidential aide Billy Keikeya (Paul Campbell) to join his quest for peace with the rebels. After discovering Elosha s grave on Kobol, the Galactica landing party continues its search and finally intercepts Roslin and her group. Putting aside old conflicts, Adams opens the door to peaceful

Cancer-stricken President Laura Roslin (Mary McDonnell) lies near death in Galactica's emergency room. Still lucid and in command, she orders that the pregnancy of the Cylon Sharon (Grace Park) be terminated when unexplainable properties are discovered in a fetal blood sample. Gaius Baltar (James Callis), who, as vice-president, is poised to take over the presidency, argues that a half-human, half-Cylon child would make an ideal case study. And the child's father, Helo (Tahmoh Penikett), is stunned by the decision. Admiral Adama (Edward James Olmos) is determined to carry out Roslin's final decree until Baltar discovers that the hybrid blood cells may have fantastic healing abilities. Meanwhile, an underground group of Cylon sympathizers resort to sabotage to deliver their message humanity must broker peace with the Cylons. Adama arrests their leader, Royan Jahee (Paul Perri), but the group continues its violent rampage, bombing the tylium refinery and leaving the fleet vulnerable to enemy attack. An even

On Galactica, divisions begin to appear between those who remained on the ship during the Cylon occupation of New Caprica and those, like Starbuck (Katee Sackhoff) and Tigh (Michael Hogan), who suffered under the Cylon yoke on the planet s surface. Tigh spearheads the discontent, his faith in human loyalty shattered by the betrayals he experienced on New Caprica. Starbuck, unable to shake off the pain of her long Cylon imprisonment, falls into step with him. After Lee (Jamie Bamber) and Kat (Luciana Carro) fail to settle the simmering rebellion, Adama (Edward James Olmos) is forced to put his leadership on the line to hold Galactica together. Meanwhile, in the Cylon fleet, Baltar (James Callis) plays a slippery game with the Cylons in order to persuade them he's worth keeping alive. When a crisis hits the Cylon fleet and a base ship is infected with a deadly virus, Baltar must prove his worth by volunteering for a dangerous mission.

When the fleet's food-processing machinery is contaminated, the threat of starvation looms. Sharon (Grace Park) is sent out to find a planet that can supply food for 38,000 people. She finds a planet with a rich supply of algae, but it's on the opposite side of a massive star cluster and passage will expose people to massive doses of radiation and disable the navigation systems of the civilian ships. Adama (Edward James Olmos) develops a plan to use the Raptors to guide the civilian ships through, but it will take an enormous toll on the pilots. When Kat (Luciana Carro) expresses her concerns, Kara (Katee Sackhoff) turns on her, while Kat's old colleague Enzo (Patrick Currie) threatens to reveals dark secrets from her past. Meanwhile, Baltar (James Callis) discovers that D'Anna (Lucy Lawless) is using the power of resurrection to look beyond the physical world. He follows her, hoping to learn more about what she's doing - and more about himself.

The trial of Gaius Baltar (James Callis) is underway. Unable to prove his role in the genocide of the Twelve Colonies, prosecutor Didi Cassidy (Chelah Horsdal) focuses on the charge of treasonous collaboration with the enemy on New Caprica that resulted in the loss of 2,600 human souls. With Lee Adama (Jamie Bamber) as his now-willing associate, Romo Lampkin (Mark Sheppard) opens the defense by arguing that the trial is motivated by mob bloodlust and Laura Roslin's (Mary McDonnell) need for vengeance. But with a succession of powerful witnesses lined up to testify against Baltar - including President Roslin and Colonel Tigh (Michael Hogan) - the defining issue becomes how far will Lee go to question the word of the fleet's leaders, while risking the increasing enmity of the chief judge: his own father, Admiral Adama (Edward James Olmos). And the Machiavellian Lampkin isn't shy about exploiting Lee's antagonistic relationship with the Admiral to gain an edge in the hostile courtroom. For his part, the Ad

Season 4: Edward James Olmos answers fans' queries from the Forum in this special Q&A series.

Season 1: Edward James Olmos answers fans' queries from the Forum in this special Q&A series.

Season 1: Actor Edward James Olmos (Admiral William Adama) talks about the role of Latinos in science fiction and how they offer hope to future generations.

Actor Edward James Olmos (Admiral William Adama) talks about the challenge of resurrecting a series, especially this one.

Actor Edward James Olmos (Admiral William Adama) discusses the impact of the script's mission statement and how it helped him decide to take the part.