1x01-02-03 Saga of a star world (aka Battlestar Galactica)

Egy másik galaxisban az emberek és a népirtó cylonok harca folyik. A cylonok elhatározása, hogy elpusztítsák az emberiséget, és egy csellel megtizedelik a népet. Csak a Galactica csillaghajó és legénysége marad meg, és utazásra indul a galaxisban egy rég elveszett legendás civilizáció, a Föld felkutatására.

1x04 Lost planet of the gods I.

Sok harcos szenved valamilyen ismeretlen betegségben, a Galactica új vipera pilótákat képez—leginkább fiatal nőket, beleértve Apollo friss menyasszonyát, Serinát. Adama spirituális értelmezései (?) által vezérelve a hajó elhagyja legendás otthonukat, a Kobolt. 

1x05 Lost planet of the gods II.

Mielőtt még Adama megfejthetné a Föld helyét a hieroglifákból, egy cylon támadás elpusztítja a szent várost, és Serina életét követeli.

1x06 The lost warrior

Marooned on a frontier planet, Apollo befriends a young widow and her son, rallying a town against "Red Eye"— a likewise marooned, yet memory-damaged, Cylon centurion gunslinger. The storyline is very much reminiscent of the classic western Shane.

1x07 The long petrol

After losing an experimental Viper to a smuggler, Starbuck is imprisoned in a "unique" environment that holds a possible clue to Earth.

1x08 Gun on ice planet zero I.

Herded into a confined area of space, the fleet must pass within close range of a lethal Cylon pulsar cannon—unless an expedition of officers from the Galactica and convicts from the Prison Barge can penetrate the ice-bound fortress housing the weapon and destroy it.

1x09 Gun on ice planet zero II.

Apollo, Starbuck, and Boomer lead a team of cut-throat demolitions and cold-weather experts (and the stowaway Boxey). Along the way, they encounter the misguided human scientist who originally built the weapon, as well as his legions of clones.

1x10 The magnificent warriors

When a Cylon attack destroys the fleet's food supply, Adama and the others must agree to certain compromises with old acquaintances and with the inhabitants of a grain-rich, yet politically turbulent planet.

1x11 The young lords

Crash-landing on the planet Atilla, Starbuck befriends a group of siblings trying to free their castle, their planet, and their father from the Cylons.

1x12 The living legend I.

The Galactica is reunited with the Pegasus, a sister battlestar previously thought destroyed. Led by the arrogant Commander Cain, the fleet is torn in its loyalty between Adama and Cain until the human traitor Baltar launches a devastating attack.

1x13 The living legend II.

The Galactica and Pegasus eventually join forces in a daring attack on the Cylons. The Pegasus plunges into the teeth of Cylon forces and is either destroyed or "missing in action" after the attack.

1x14 Fire in space

The Galactica is rammed by Cylon Raiders making suicide runs on the main bridge and a landing bay. With Adama lying critically ill, Boomer and Athena lead a group of survivors in the rejuvenation center, with more than a little help from Boxey's daggit Muffy.

1x15 The war of the gods I.

Vipers are disappearing from regular patrols, and mysterious bright lights are flying around the Galactica at immeasurable speed. On an eerie, red-glowing planet, the enigmatic Count Iblis is found, apparently the sole survivor of a major catastrophe.

1x16 The war of the gods II.

Always shunning the mysterious bright lights, Iblis uses his charm and his supernatural powers to wrest control of the fleet from Adama, but the wiley Commander knows Iblis' key is on the red planet, where Apollo and Starbuck go only to face tragedy - and find the answer to the mysterious lights.

1x17 The man with nine lives

An old con man, Chameleon, meets Starbuck and hoodwinks him into believing that he may be Starbuck's father, to gain Starbuck's help in evading a trio of blood-thirsty Borellians who are after him seeking revenge for a previous con; in the process, the con man and Starbuck's girlfriend Cassiopeia learn a surprising secret about his "con" of Starbuck.

1x18 Murder on the rising star

When Starbuck is implicated in a rival triad-player's murder, Apollo and Boomer come to his defense as Protectors. They eventually uncover a plot involving Karibdis, a traitor alongside Count Baltar in the Destruction of the Twelve Colonies.

1x19-20 Greetings from Earth

A human sleeper ship found drifting in space is brought aboard the Galactica, leading to argument and debate on whether to awaken its occupants. Their ship is eventually escorted by Apollo, Starbuck, and Cassiopeia to the planet Paradeen — embroiled in a bitter war with the Eastern Alliance.

1x21Baltar's escape

Baltar escapes from the prison barge by hijacking a shuttle piloted by Boomer and Sheba. Taking advantage of lax security imposed by the new governing council, Baltar kidnaps the council members from a Galactica landing bay and demands to be released.

1x22 Experiment in Terra

The mysterious bright lights return again, transporting the bewildered Apollo to the planet Terra to avert war with the Eastern Alliance. Exposing a plan by the devious president, Apollo has Starbuck warn the Galactica, which uses its laser cannon to destroy all the ballistic missiles avoiding planetary holocaust.

1x23 Take the celestra

When Starbuck encounters his long-lost love Aurora, she complicates matters by taking part in a mutinous rebellion aboard the Celestra. Her rebellion, undertaken for a noble cause, is soon overshadowed by a sinister mutiny by Charke, the Celestra's power-hungry second-in-command.

1x24 The hand of God

Receiving a mysterious radio signal possibly from Earth, Adama and the crew are wary of a Cylon trap, and decide to turn the tables by attacking the Cylons with a stolen Cylon Raider. Apollo and Starbuck, in the series finale's last scene, narrowly miss receiving Apollo-11 moon-landing transmissions from Earth.