第 4 季 共 20 集
播出时间：2008年4月5日
第 1 集 He That Believeth in Me
播出时间：2008年4月5日
During the Cylon attack, Sam Anders has a strange encounter with a Cylon Raider. The crew of the Galactica view Starbuck's return with suspicion and doubt. Gaius Baltar takes refuge with a group of women who believe he has the power to heal others.
第 2 集 Six of One
播出时间：2008年4月12日
The Cylons learn that the Final Five are in the Colonial fleet. Some of the Cylons want the Cavil model to stop lobotomizing the Raider ships. Starbuck desperately tries to convince the others that the fleet is going the wrong way in their search for Earth.
第 3 集 The Ties That Bind
播出时间：2008年4月19日
Kara Thrace seeks her own path in the search for Earth while the Cylons face the threat of sentient Centurions. A member of Galactica's crew learns a dark secret about a loved one.
第 4 集 Escape Velocity
播出时间：2008年4月26日
Gaius Baltar sets off a debate on religious freedom when he promotes his belief in a single God.
第 5 集 The Road Less Traveled
播出时间：2008年5月3日
Specialist Tyrol continues to sink into despair after his recent loss. He becomes curious about Gaius Baltar's sermons and the following he has attracted. The crew of the Demetrius grow concerned about Kara's mental stability as an old enemy arrives with a tempting offer.
第 6 集 Faith
播出时间：2008年5月10日
The dying President Roslin and the aggressive Viper pilot Kara Thrace try to accept the new terms of the relationship with the Cylons.
第 7 集 Guess What's Coming to Dinner?
播出时间：2008年5月17日
President Roslin faces challenges as the Colonials plot with Cylon rebels to destroy a Resurrection Hub.
第 8 集 Sine Qua Non
播出时间：2008年5月31日
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.
第 9 集 The Hub
播出时间：2008年6月7日
Colonial Viper pilots plan an attack on the Resurrection Hub with their Cylon rebel allies.
第 10 集 Revelations
播出时间：2008年6月14日
D'Anna holds President Roslin and other Colonials hostage in order to draw out the Final Five from the Colonial fleet. Col. Tigh believes he has the solution to end the standoff.
第 11 集 Sometimes a Great Notion
播出时间：2009年1月17日
Loyalties are made clear when Gaeta orchestrates a coup d'état of the Adama regime. Both prisoners and lives are taken as many of the fed up people work to take over Galactica.
第 12 集 A Disquiet Follows My Soul
播出时间：2009年1月24日
President Roslin faces off against Tom Zarek and Lt. Gaeta as they try to take control of the Colonial fleet. Both the alliance with the rebel Cylons and Adama's life are at stake.
第 13 集 The Oath
播出时间：2009年1月31日
As Sam Anders recovers from his head injury onboard the Galactica, he begins to remember events from ancient Earth. The Final Cylon struggles with the fallout from the Final Five's former plans. One of the humanoid Cylons vows to get revenge for being created in the image of Man. Tyrol informs Admiral Adama about the extensive structural damage on the Galactica.
第 14 集 Blood on the Scales
播出时间：2009年2月7日
Ellen escapes from Cavil only to face a momentous choice regarding the 13th Tribe and the Final Five Cylons.
第 15 集 No Exit
播出时间：2009年2月14日
Kara feels lost while she struggles to cope with Sam's continued coma, meanwhile Boomer faces charges of treason from the Cylons onboard the base ship who blame her for voting against her model during the civil war causing the deaths of thousands of Cylons.
第 16 集 Deadlock
播出时间：2009年2月21日
The rebel Cylons and the Colonial humans react to Hera's kidnapping while the physical condition of the Galactica continues to deteriorate.
第 17 集 Someone to Watch Over Me
播出时间：2009年2月28日
With Galactica on the verge of falling apart, Admiral Adama readies the ship for what could be its final mission, as Baltar's Six warns that humanity's final chapter is near.
第 18 集 Islanded in a Stream of Stars
播出时间：2009年3月7日
Adama and the Galactica crew stake the survival of the human race on their plan to rescue Hera from the Cylon colony in this, the series finale.
第 19 集 Daybreak (1)
播出时间：2009年3月14日
The Galactica is launching a rescue mission to retrieve Hera Agathon from the "colony", a heavily armed and defended Cylon base located near a black hole. They manage to rescue Hera, and in the end, the fleet finds a new planet to settle on, which they come to call Earth.
第 20 集 Daybreak (2)
播出时间：2009年3月21日
Adama and the Galactica crew stake the survival of the human race on their plan to rescue Hera from the Cylon colony in this, the series finale.
