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Season guide

Battlestar Galactica: Season 4

20 episodes Premiered Apr 4, 2008 Updated Oct 7, 2026

As the fourth season of Battlestar Galactica begins, the remaining members of humanity continue their ongoing search for a new home. The crew of the Galactica remains tasked with the protection of the small civilian fleet, which represents the last remnants of the human race. As they navigate their journey toward the fabled thirteenth colony known as Earth, the crew must attempt to make sense of the inexplicable even

Previously on Battlestar Galactica

Season 4 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ The Cylons are an old enemy that resurfaced to obliterate the twelve colonies.
  • ⚡ The Galactica and its crew are responsible for protecting the last remnants of humanity.
  • ⚡ The civilian fleet is engaged in a journey to find the fabled thirteenth colony, Earth.
  • ⚡ Four members of the fleet are currently dealing with the consequences of past revelations.
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Season overview

As the fourth season of Battlestar Galactica begins, the remaining members of humanity continue their ongoing search for a new home. The crew of the Galactica remains tasked with the protection of the small civilian fleet, which represents the last remnants of the human race. As they navigate their journey toward the fabled thirteenth colony known as Earth, the crew must attempt to make sense of the inexplicable events they encounter. Simultaneously, four members of the fleet are depicted as reeling from the impact of past revelations. This season follows the established premise of the series, which began after an old enemy, the Cylons, resurfaced to obliterate the twelve colonies. The narrative continues to focus on the struggle for survival as the fleet travels through space, facing the challenges posed by their pursuers and the internal pressures of maintaining a civilization in exile. The season serves as the final installment of the four regular seasons that followed the initial miniseries, concluding the overarching story of the human survivors and their quest for a permanent refuge.

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Season 4 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 4 Progress Shield

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Binge Efficiency Engine

Season 4: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

20%
80%
Mytharc (4): Crucial lore & season climaxes
Core (16): Character development & subplots
Side Quest (0): Standalone / filler
S4·E1 Mytharc

He That Believeth in Me

Apr 4, 2008 · 44 min

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 refug

S4·E2 Core

Six of One

Apr 11, 2008 · 44 min

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 convinc

S4·E3 Core

The Ties That Bind

Apr 18, 2008 · 44 min

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.

S4·E4 Core

Escape Velocity

Apr 25, 2008 · 44 min

Gaius Baltar sets off a debate on religious freedom when he promotes his belief in a single God.

S4·E5 Core

The Road Less Traveled

May 2, 2008 · 44 min

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

S4·E6 Core

Faith

May 9, 2008 · 44 min

The dying President Roslin and the aggressive Viper pilot Kara Thrace try to accept the new terms of the relationship with the Cylons.

S4·E7 Core

Guess What's Coming to Dinner?

May 16, 2008 · 44 min

President Roslin faces challenges as the Colonials plot with Cylon rebels to destroy a Resurrection Hub.

S4·E8 Core

Sine Qua Non

May 30, 2008 · 44 min

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 member

S4·E9 Core

The Hub

Jun 6, 2008 · 44 min

Colonial Viper pilots plan an attack on the Resurrection Hub with their Cylon rebel allies.

S4·E10 Core

Revelations

Jun 13, 2008 · 44 min

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.

S4·E11 Core

Sometimes a Great Notion

Jan 16, 2009 · 44 min

Kara struggles with the foreboding prediction of the Cylon Hybrid, while Adama and the Colonial fleet face despair over their shocking discovery.

S4·E12 Core

A Disquiet Follows My Soul

Jan 23, 2009 · 44 min

Tigh and Number Six take their first glimpse at their unborn child, Tyrol offers Adama Cylon technology in return for his fellow Cylons properly reintegrated into the fleet, and an

S4·E13 Core

The Oath

Jan 30, 2009 · 44 min

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.

S4·E14 Mytharc

Blood on the Scales

Feb 6, 2009 · 44 min

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.

S4·E15 Core

No Exit

Feb 13, 2009 · 44 min

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

S4·E16 Core

Deadlock

Feb 20, 2009 · 44 min

Ellen escapes from Cavil only to face a momentous choice regarding the 13th Tribe and the Final Five Cylons.

S4·E17 Core

Someone to Watch Over Me

Feb 27, 2009 · 44 min

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 agai

S4·E18 Core

Islanded in a Stream of Stars

Mar 6, 2009 · 44 min

The rebel Cylons and the Colonial humans react to Hera's kidnapping while the physical condition of the Galactica continues to deteriorate.

S4·E19 Mytharc

Daybreak (1)

Mar 13, 2009 · 44 min

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.

S4·E20 Mytharc

Daybreak (2)

Mar 20, 2009 · 92 min

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.

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