As President Roslin nears death, Dr. Gaius Baltar must be groomed for the worst case scenario. Roslin orders the death of Sharon’s unborn child. A sabotaged Viper leads to an investigation that uncovers a movement of people seeking peace with the Cylons.

The struggle between Adama and Cain is temporarily put on hold while the two Battlestars combine forces for an assault on the Cylon Resurrection Ship. Apollo faces a momentous decision and Baltar takes an interest in Gina, the Cylon prisoner.

The Battlestars Galactica and Pegasus face a new Cylon target, a “Resurrection” ship, while a power struggle threatens to result in all-out war among the human fleet.

Battlestar Galactica was not the only Battlestar to have survived the cylon attack, The Battlestar Pegasus also survived.

Sharon informs Adama that the Galatica has been infected with a computer virus that is tampering with the basic ship functions and is scanning them for weaknesses. All this is preparation for a major assault by the Cylon Raiders. So with the clock ticking

A reporter is sent to Galactica to chronicle the harsh realities of life during wartime.

Adama heads to Kobol to find Roslin, reassembles the fleet and heads down to Kobol himself to find the presidential party in search of the “Tomb of Athena” which allegedly leads to Earth. Apollo hangs out with Starbuck , Zarek tries to keep his cronie off plotting with Boomer who is unaware of tension building between Helo and Tyrol.

President Roslin’s fragile coalition is put to the test in the first part of a two-part story. Apollo, who has sided with Roslin, runs into a conflict with Zarek and his accomplice Meier.

Adama and Roslin fight for the hearts and minds of the fleet’s population, as Starbuck finds herself trapped in a supposed resistance hospital.

Tigh imposes martial law and threatens to split the fleet as Lee works to free President Roslin and organize democratic resistance.

Democracy is brought back to the fleet and soon with it come hardball politics and potentially deadly intrigue.

Tigh has to work with Lee to defeat a Cylon boarding party that threatens to take over Galactica and destroy the fleet.

With Adama out of action, Colonel Tigh takes his position as commander of the Galactica. Boomer is in jail, and the cat’s out of the bag – she’s a Cylon.

When Commander Adama learns that Kara disobeyed orders and Jumped to Caprica on orders from President Roslin, he demands the president’s resignation, with the implied threat of a military coup. Roslin refuses his demand and sparks a confrontation.

While flying a supply patrol, Crashdown and Sharon Valerii discover a bountiful planet that can support human life. Indeed, it might be Kobol, the legendary “home of the gods.” The discovery prompts Commander Adama to send a ground team to investigate; it also gives new life to President Roslin’s belief that she is a tool of destiny and that this discovery, like her rapidly spreading cancer, is part of an ancient prophecy.

When President Roslin calls an Interim Quorum of the Twelve Colonies, she discovers that democracy brings its ugly stepsisters — politics and deadly intrigue — to the party. Tom Zarek, the charismatic convicted terrorist, is elected as the delegate from Sagittaron and immediately proposes elections for the vice-presidency.

As its fuel supply dwindles, the fleet must seek out a new supply of tylium ore or risk becoming sitting ducks to any Cylon attack. A recon patrol finds an asteroid full of the fuel, but there’s a catch — the Cylons have found it first and established a heavily guarded refining plant.

President Roslin’s fears that Commander Adama is a Cylon are stoked when she learns he’s making secret wireless calls to other ships. Then, to make things worse, a single Cylon raider appears near the Galactica and begins acting strangely after being damaged in battle.

A Cylon, who calls himself Leoben, is discovered on one of the ships in the fleet. Commander Adama sends Kara to interrogate him — or, rather, it. The Cylon tells Kara that he planted a nuclear device on one of the ships. Although she doesn’t believe it, Kara passes on the warning.

When Baltar and the Number Six who lives in his head have a falling out, she abandons him, only to surface a short while later aboard the Galactica. But now she’s called Shelley Godfrey, everyone can see her, and she’s telling them that she has evidence, passed on by the late Dr. Amarak, that will prove Baltar sold out the human race to the Cylons.

When a new copy of Doral, a Cylon who had been previously exposed while serving as the Galactica’s public-relations officer, sneaks aboard and blows himself up, killing three people, Commander Adama and President Roslin must finally make public the terrifying secret known only to a select few: Cylons now look like humans.

When Lt. Kara Thrace goes missing in action after encountering a Cylon patrol while on a training mission, Commander Adama feels responsible — especially in light of her recent admission that she blames herself for his son Zak’s death.

After a flight deck accident kills 13 pilots and wounds many others, Kara is thrust into service as a flight instructor and ordered to turn a group of civilian pilots and academy washouts into full-fledged Viper pilots.

The fleet has found a source of water, but who will take on the difficult and dangerous job of mining it from the icy planet? Commander Adama and President Roslin send Lee to the Astral Queen, a prisoner transport ship, with an offer for its inmates: Volunteer for this mission and earn “freedom points”.

Lt. Sharon Valerii wakes up soaking wet in the tool room with an explosive charge in her duffel bag. Shortly afterward, a mysterious explosion destroys all the port-side water tanks on Galactica, creating a crisis for the entire fleet. Sharon can’t remember a thing, but all the evidence points to her as a saboteur. She confesses her concern to Chief Tyrol, but he can’t believe she’s responsible.

In the wake of the Cylon sneak attack, the ragtag fleet of human survivors is forced to play a deadly game of cat-and-mouse with their pursuers. Every 33 minutes, they make a jump to a new location. And every 33 minutes, the Cylons manage to find them. The pilots are on the brink of exhaustion, relying on artificial stimulants to keep fighting, and the civilians are beginning to doubt the leadership of Commander Adama and President Roslin.

The gang takes a tour down memory lane, which includes a final round of “True American.”

Jess and Nick make two life-changing decisions and Winston and Aly’s big day arrives.

Nick’s plan to propose to Jess is thrown off-course when they decide to get a dog, Winston sees color for the first time and Schmidt worries about Cece getting pregnant again.

Jess tries to appease Winston’s anxiety about his impending fatherhood by tracking down his long lost dad. Meanwhile, Schmidt goes back to work for the first time since Ruth’s birth.

The gang gathers for a one-year memorial service for a beloved friend. Meanwhile, Jess discovers Coach owes Nick a large sum of money.

Nervous about Ruth’s interview at a prestigious pre-school, Schmidt recruits Jess to help her prepare. Meanwhile, Nick procrastinates writing, and Winston prepares to confront his fear of testifying in court.

Over a drunken power lunch, Jess and Cece decide to stand up to Russell and demand Jess be given more responsibility in her new job. Meanwhile, Nick struggles to come up with ideas for a new book and Schmidt is desperate to get Ruth to sleep.

Jess and Nick come back from a book tour for “The Pepperwood Chronicles” across Europe.

Jess is ready to tell Nick of her true feelings for him. Meanwhile, Nick takes a meeting with a book publisher, as Aly helps Winston reconnect with an important person. Then, Cece and Schmidt receive big news.

As Jess continues to stay with her dad in Portland, they unexpectedly help one another with their love lives. Meanwhile, Nick turns to a reluctant Aly for help with his relationship with Reagan, and Schmidt contemplates using his first name.

Jess avoids her feelings for Nick by taking care of her dad in Portland. While attending a work party with Reagan, Nick panics that they really don’t know each other. Meanwhile, Aly prepares to meet Winston’s mom for the first time, as Winston admits he hasn’t told her they are cops.

When Reagan returns home from a work trip, Jess is concerned that she has been spending too much time being Nick’s “girlfriend.” Meanwhile, Schmidt and Cece obsess over security in their new home and Aly reveals an embarrassing secret to Winston.

When Jess worries that she may not be a cool enough principal, she recruits Nick and “The Pepperwood Chronicles” to help make her popular with the students. Meanwhile, Schmidt hires an eager and overly-aggressive new assistant and Winston realizes that Furguson may be two-timing him.

When Jess gets nervous about starting her new position as principal, Nick and Schmidt decide to take her on a relaxing day trip to Solvang, which quickly goes “sideways.” Meanwhile, with Cece’s help, Winston tries to finalize his divorce from Rhonda, but finds that he and Aly are caught in a series of never-ending pranks.