Battlestar Galactica : Episode Synopsis

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Season 1


After 40 years of complacency without contact from their rebellious creations, the Cylons, humanity is shaken by a sudden and swift sneak attack on their homeworld of the Twelve Colonies. Only one battlestar escapes the Cylons' tactics: Galactica. Those left alive must fight not only for their own survival but that of the very future of the human race.


The fleet's exodus has not been clean and easy. After every jump, the Cylons appear exactly 33 minutes later to send them on the run again. Working with little to no sleep, everyone is being pushed to their limit.

Baltar himself is put into stress when someone from the Olympic Carrier claims to have evidence he fears could link him to the Cylons' successful attack on the Twelve Colonies.


An act of sabotage leaves Galactica with a 60% loss of its water reserve. The belief that it is an act of a Cylon agent is high among those in the know. Even worse is that Boomer suspects herself to be the saboteur.

Bastille Day

With water now found on a nearby moon in the form of ice, a labour source must be used to mine it. The answer is to use the prisoners aboard the Astral Queen. However, convicted terrorist Tom Zarek acts as their leader and organises a revolt, taking hostages with the demand of President Roslin's resignation.

Act of Contrition

When an accident kills several Viper pilots, Adama puts Kara in charge of training more pilots. But the entire process is troubling for her as she is haunted by memories of Zak.

You Can't Go Home Again

After an attack by Cylon Raiders during a training mission, Kara crashes on the surface of a moon. Convinced that she is still alive, the Adamas are determined, even at the risk of the fleet, to find and rescue Starbuck.


When a copy of a known Cylon agent boards Galactica and carries out a suicide bombing, the knowledge of the Cylons' new human appearance is shed to the fleet.

With the ship's munitions used in the attack, Commander Adama initiates a tribunal to investigate the security lapse.

Six Degrees of Separation

When the Number Six haunting his head suddenly disappears, Baltar finds himself facing a flesh-and-blood copy calling herself "Shelly Godfrey" who accuses him of collaborating with the Cylons. With evidence at hand, Baltar is madly driven to relieve himself of the charge of treason.

Flesh and Bone

When a Cylon agent is found aboard a ship in the fleet, Adama, by Roslin's request, sends Kara to interrogate the one called Leoben Conoy. Though she approaches impenetrable to his tactics, the Cylon engages her in a discussion of his specific dogma, including how special he believes Kara to be.

Tigh Me Up, Tigh Me Down

With Baltar's Cylon detector now operational, Roslin wants Adama to be the one to go first. Adama himself has been acting odd lately, due to his discovery of Tigh's wife, Ellen. The tackling of suspicion between the President, Commander, Colonel and his wife puts Baltar in the middle with the painstaking chore of the screening process.

The Hand of God

With fuel running low, and the fleet's only supply occupied by Cylons, Adama plans a dangerous attack in order to obtain the tylium that could last them years. Unbeknownst to those plotting and fighting the battle, divine hands maybe orchestrating things via Roslin and Baltar.

Colonial Day

President Roslin uses the arrival of Colonial Day to form a new Quorum of Twelve. But soon Sagittaron's elected delegate Tom Zarek proposes that a vice president be chosen, his popularity quickly earning him a nomination. Not wanting to play into whatever Zarek maybe plotting, Roslin is adamant to choose her own candidate.

Kobol's Last Gleaming (1)

A habitable planet is found during a scouting mission. This world turns out to be Kobol, the legendary home of the Gods, and its discovery gives Roslin certainty that she is following an ancient prophesy, a belief that threatens to create dividing lines.

Kobol's Last Gleaming (2)

By Roslin's request, Kara has jumped to Caprica to retrieve the Arrow of Apollo where she encounters a familiar face and a startling revelation.

Following Kara's defiance of his orders, Adama has more betrayals waiting for him - one coming from the most unexpected person.

Season 2

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With Adama critically wounded, Colonel Tigh is now in a position he never wanted to be in: commander of Galactica. To make matters worse, an error in jump calculations separates the ship from the rest of the fleet.

Meanwhile, as Starbuck faces Sharon's Cylon identity and her relationship with Helo on Caprica, the crew of the downed Raptor try to stay alive on Kobol.

Valley of Darkness

The success of reuniting with the fleet is short-lived as Galactica has been boarded by a party of Cylon Centurions, while Baltar's visions on Kobol are becoming more disturbing.


Tigh feels further stress in his position when he must confront the Quorum of Twelve over Adama's decision to imprison President Roslin.

On Kobol, the survivors struggle to ensure rescue when they find the Cylons building an anti-aircraft battery.


As Tyrol is jailed for suspicion of being a Cylon, Tigh's declaration of martial law is causing unrest in the fleet, prompting Lee to help plot Roslin's escape.

Elsewhere on Caprica, Helo and Starbuck meet a group of resistance fighters led by pyramid players.

The Farm

When Kara is wounded, she wakes up in a hospital where she discovers an unsettling part of the Cylons' plans.

Now up and about, Adama faces to pick up many of the pieces left scattered since his absence. Among those is the increased division of the fleet due to their loyalty to Roslin.

Home (1)

Adama tries to carry on commanding the remains of the fleet, even with the loss of material and people.

With the Arrow of Apollo in their possession, Roslin and others set foot on Kobol to embark in the quest for the tomb of Athena.

Home (2)

Roslin and the others are still plagued by the dangers surrounding them on Kobol. This is especially troubling with the Cylon Sharon as their guide. When Adama joins in his goal to reunite the fleet, the mistrust of her is doubled, as is the danger.

Baltar, meanwhile, has doubts that the Number Six he sees is just a chip in his head.

Final Cut

The actions of Tigh's temporary command has resulted in much negative perception of the military. In order to alleviate this contempt, reporter D'Anna Biers is allowed full access to Galactica and its people to allow the fleet to see the human face of those who protect it.

Flight of the Phoenix

Morale among the crew is beginning to wear thin. Their only rallying point of hope is the building of a fighter from scratch initiated by Chief Tyrol, a project he uses to help himself cope with the abruptly ended relationship with Sharon. Meanwhile the current Sharon being held on Galactica is the target of much of the crew's resentment, though she maybe their only hope when a virus threatens to usher in a Cylon attack.


Everyone on Galactica is excited when they find another lost survivor of the Cylon attacks: the battlestar Pegasus. Soon, however, things begin to sour when the crew finds itself under the rule of Helena Cain, an admiral who is more stern than Adama.

Resurrection Ship (1)

When Kara returns from an unauthorised recon mission, Adama and Cain decide to put their conflict on hold long enough to destroy a valuable Cylon asset.

Resurrection Ship (2)

As the two battlestars prepare to destroy the Cylons' resurrection ship, Adama and Cain ready their people to carry out their orders while Baltar comforts the Pegasus' Cylon prisoner.


Roslin's cancer pushes her to her final hours, as she looks back at her relationship with President Adar, and particularly a significant day on Caprica.

During this time, a group of Cylon sympathisers threaten the safety of the fleet.

Black Market

When Pegasus commander Jack Fisk is found murdered, Admiral Adama assigns Lee to investigate. Haunted by his near-death experience and memories of a lost lover, Lee uncovers a large black market organisation.


Galactica sends Vipers to protect mining units on an asteroid from Cylon Raiders. But one in particular, filled with rage and unwilling to die a permanent death, gives the pilots the most trouble. Questioning what she herself has to live for, Starbuck enters a competition with Kat to gun it down for good.


Adama's reliance on Sharon for information is put to the test when a widow and three assistants take hostages on Cloud 9. With rumblings of a Cylon alive on Galactica stirring in the fleet, their demand is the Cylon they believe to be working towards their destruction.

The Captain’s Hand

Lee and Kara butt heads with the new commander of Pegasus after a Raptor team goes missing. He is determined to rescue his men, but he may very well be heading his ship into a trap.

Meanwhile, a young girl's desire for an abortion is a political issue that weighs heavier on Roslin as a moral dilemma.


The consciousness of two Cylon models have been downloaded into new bodies and made celebrities for their success: the Number Six who seduced Baltar before the attack on the Colonies and the sleeper agent from Galactica known as Boomer. However, neither are accepting of their status.

Elsewhere in the Colonial fleet, a decision must be made over what to do with Sharon's baby for fear of what the hybrid child might mean to the Cylons.

Lay Down Your Burdens (1)

While on a major rescue mission to Caprica, an accident leads to the discovery of a habitable planet. And since it is also clouded from Cylon detection, Baltar uses the hope of settling the fleet on its surface as a major platform to help boost his campaign against Roslin.

Lay Down Your Burdens (2)

As the fleet vote for their new leader, a shift in the Cylons' own leadership offers humanity a reprieve. However, Roslin is certain that Baltar's presidency will bring with it only disaster, and is prepared to do whatever it takes to prevent it.

Season 3

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Occupation (1)

With four months under Cylon occupation, a resistance group has gathered support on New Caprica in the hope of Adama executing a rescue mission. However, the most effective method of striking at their occupiers may mean crossing an unspeakable line, not just for the Cylons, but for their own people.

Precipice (2)

While the Cylons begin a crackdown in an effort to help squash the insurgence, Adama continues with a plan to rescue the people of New Caprica by sending in Sharon as a liaison to the resistance.

Exodus (1)

The resistance fighters prepare to coordinate efforts with Galactica to free the occupants of New Caprica as Adama orders his son and Pegasus to stay behind to protect the remains of the fleet.

Meanwhile, Number Three receives visions and words of prophesy regarding the Cylon/human hybrid child Hera.

Exodus (2)

The New Caprica rescue mission gets underway. However, not everyone will make it off the planet and the battle, in fact, maybe too much for even the battlestar Galactica alone to handle.


Six of the New Caprica resistance fighters have formed a secret jury to privately try, judge, and execute "the worst of the worst" of the people who collaborated with the Cylons.

Elsewhere on a basestar, Baltar awaits for the Cylons to make their decision on whether he stays or goes.

Torn (1)

In an effort to continue the search for Earth, Roslin and Adama consult Baltar's own research to find the next signpost. Unbeknownst to them, the disgraced former President has given his same findings to the Cylons in an effort to keep himself in their good graces, only for them to discover something that has infected a basestar with a strange contagion.

Meanwhile, marred by their experiences on New Caprica, Tigh and Kara stir up discontent from the mess hall between the refugees and their rescuers.

A Measure of Salvation (2)

The crew of Galactica discover a deadly virus that could potentially wipe out the entire Cylon race. The only question remains, is it ethical to use it?


A man is discovered by the fleet after being imprisoned by the Cylons since before their attack on the Colonies. Unfortunately, his return brings with it a dark secret from Adama's past.

Amidst the Cylons, a copy of Number Three has dreams that pushes her to seek out what lies between life and death.

Unfinished Business

A boxing arena set up to relieve tension among the crew stirs up memories of personal events on New Caprica before the Cylon occupation.

The Passage

A food shortage leaves the fleet with no option but a dangerous passage through a radiation field to a planet they hope to harvest. A light shown on Kat's past puts her in a decision over her future.

Meanwhile, Baltar tries to find out what Number Three has been up to with her recent repeat downloading.

The Eye of Jupiter (1)

While on the algae planet, The Temple of Five is discovered, which could provide a path towards Earth. Their attempt to unlock its secret is interrupted by the arrival of the Cylons. When their lives are bartered for the sake of giving up the temple, Adama must decide whether the loss of it and the ground team, including his son, are worth sacrificing to ensure that the Cylons don't find Earth.

Rapture (2)

Led by Three's obsession, the Cylons close in on the temple with Lee and Anders trying to buy Tyrol time to find the Eye of Jupiter. Meanwhile, Sharon attempts to find her baby as Dualla rescues Kara on her husband's orders.

Taking a Break from All Your Worries

Imprisoned aboard Galactica, Baltar wrestles with the thoughts of whether he is truly human. Coupled with this is the methods of interrogation he is put through so that Roslin and Adama can know what the Cylons know about the Eye of Jupiter.

Meanwhile, Sam and Dee let their respective partners decide the future of their marriages.

The Woman King

An easily treatable illness strikes refugees on Galactica, especially among Sagittarons who refuse medical treatment on grounds of tradition. Helo, assigned to oversee the civilians, believes the Sagittarons' claims that a doctor is killing them when many wind up dying shortly after his treatment.

A Day in the Life

On their anniversary, Adama is reminded of his first wife, Carolanne, who he seemingly lets haunt him throughout the day.

Meanwhile, Tyrol and Cally, who have been having their own marital problems, become trapped in an airlock with oxygen leaking into space.

Dirty Hands

As the process of refining the fleet's tyluim becomes difficult, the pressure is put on the workers to keep maintenance, while they in turn simply want better working conditions. A book written by Baltar and smuggled out into the fleet helps to tighten this tension in the "knuckle draggers" who feel they are being treated like a lower class.


After dreaming of Leoben and the mandala she painted as a child, Kara's fitness for flight is questioned when she encounters a Cylon Raider no one else sees.

It is then that the issue of her destiny as spoken of by Leoben comes into the foreground.

The Son Also Rises

Still dealing with Kara's death, Lee is appointed to protect Baltar's new lawyer, Romo Lampkin, after his predecessor is assassinated by unidentified suspects. Inspired by Lee's grandfather, Lampkin himself may help inspire the younger Adama to carve his own path.

Crossroads (1)

The trial of Gaius Baltar begins, bringing startling revelations to light, and pitting a father and son on opposing sides.

In the meantime, Galactica tries to find out if the fleet is still being tailed by the Cylons.

Crossroads (2)

A testimony from an unexpected witness helps closes out Baltar's trial to a verdict.

Meanwhile, the music that Tigh, Tory, Galen, and Anders hear grows louder, causing them to face an unsettling possibility.

Season 4

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He That Believeth In Me (1)

Kara Thrace returns in a brand-new Viper to aide Galactica against a Cylon assault on a defenceless fleet, though her claim of finding Earth and who she is are held in doubt.

As the awakened four of the Final Five struggle to figure who they are and what they are capable of doing, Baltar finds shelter among a commune who look to him for spiritual guidance.

Six of One (2)

Kara is prepared to turn friends into enemies in her feverish desire to guide the fleet on the right path towards Earth.

The Cylons find themselves fracturing over the issue of what to do with the Raiders when they learn that the Final Five are in the fleet.

The Ties That Bind

Cally's world is turned upside down when she suspects her husband is cheating on her.

Meanwhile, Lee begins his career in politics, Kara leads a sceptical crew, and lines are finely drawn in the Cylon internal unrest.

Escape Velocity

Tyrol crumbles in the wake of Cally's death while Tigh finds himself drawn to Caprica-Six in a parallel to his own deceased wife.

Baltar takes a stand for the religious freedoms of he and his followers.

The Road Less Traveled (1)

The crew of the Demetrius begin drawing lines when Kara trusts a Cylon who offers the means of helping them find Earth.

As Baltar's word begins spreading, he seeks to make peace with Tyrol.

Faith (2)

The Demetrius allows a window for Kara to take a Raptor and a small party to the basestar to hear the Hybrid.

Roslin befriends another cancer patient, terminally ill, who finds comfort in Baltar's message.

Guess What's Coming to Dinner?

Galactica agrees to help the rebel Cylons unbox the Number Three models so as to reveal the identity of the Final Five while they, in turn, will be allowed to destroy the Cylon resurrection hub. However, alternate plans are secretly plotted as distrust still lurks within both sides.

Sine Qua Non

With the President and a number of the fleet's pilots taken when the rebel basestar jumped away, Adama begins desperate but reckless search efforts. At the same time, when it's obvious that the Admiral will not accept Zarek's assumed presidency in Roslin's absence, Lee seeks help from fallen lawyer Romo Lampkin to select someone else for the position.

The Hub

As the rebel basestar jumps to the resurrection hub, the pilots onboard put their trust in the Cylons to help destroy their target while Roslin is faced with visions that could lead she and humanity to spiritual salvation.


When the rebel Cylons hold the colonials on their basestar hostage in exchange for the Final Five within the fleet, the secret four are confronted with the fear of revealing themselves in exchange for the good of the human race.

Sometimes a Great Notion

Everyone comes to terms with the discovery of a devastated Earth. As despair begins to spread, unlocked secrets of the ruined planet bring forth horrific discoveries, as well as revelations for the Final Five.

A Disquiet Follows My Soul

With the proposal of integrating the Cylons into the fleet, including allowing them on civilian ships to upgrade FTL drives, despondency from Earth turns into anger and distrust as Zarek sways the Quorum and other parties to take a stand over the alliance with the Cylons.

The Oath (1)

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.

Blood on the Scales (2)

Gaeta begins the process of trying Adama for his treasonable actions, but is conflicted with Zarek's own course of actions. Meanwhile, the small band of resistance on Galactica fights to regain control of the ship as Roslin attempts to maintain leadership as a refugee on the rebel basestar.

No Exit

As Tyrol is assigned to repair Galactica's foreboding wear and tear, the bullet in Anders's brain unleashes a flood of memories that reveal the connection between the Final Five and the other Cylons.

However, everyone is unaware that the opposing faction of Cylons have been hiding Ellen since her resurrection about a year ago. And she has secrets to reveal as well.


Ellen reunites with the Cylons who vote to leave the human fleet, but Saul is left divided between the woman he once knew and the one carrying his child.

Meanwhile, Baltar helps his followers look out for both themselves and others while Adama oversees the Cylon repairs to Galactica.

Someone to Watch Over Me

The Cylons wish to transport Boomer to the baseship to stand trial for treason, but Tyrol is driven by their past relationship to help her.

Meanwhile, Kara befriends a piano player, helping him to compose an important piece of music.

Islanded in a Stream of Stars

As Adama is faced with the heartbreaking possibility of abandoning his increasingly deteriorating battlestar, Kara's connection to the mysterious music that ties her with Hera and the Final Five drives her to find out what she really is.

Daybreak (1)

In the midst of stripping Galactica's parts, Adama rethinks his decision on not retrieving Hera from the Cylon colony and Baltar pleads for his people to be represented in the government.

Daybreak (2)

Destinies that have long been in the making are finally decided when Galactica mounts its final mission in an effort to rescue Hera from the Cylon colony.

The Plan

Orchestrated by the spiteful Number One model, the Cylons carry out a devastating attack on the Twelve Colonies, but things don't go so well. Remnants of humanity survive among a small fleeing fleet of ships and a band of resistance fighters on Caprica. Determined to finish the end of humanity and strike back at their Cylon mothers and fathers, two copies set out to clean up the aftermath, but run into problematic factors they didn't calculate when they started.

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