Events and conflicts reach their climax, and humans and Cylons face a stark decision.

Admiral Adama leads a group of volunteers aboard the Galactica into a dangerous mission to rescue Hera.

As the Galactica is stripped for parts, a call for volunteers is made for a final mission.

The ship continues to deteriorate as repairs continue; Hera is delivered to Cavil.

Thrace plays piano in a bar; Boomer faces extradition; Tyrol realizes Boomer tricked him.

The survivors of the massive attack by the Cylons desperately search for the fabled 13th colony, Earth.

Ellen Tigh resurfaces; Anders tells Kara that he remembers everything.

Rebels seize control of Galactica and take steps to eliminate Roslin and Adama.

Gaeta and Zarek execute a power grab the puts Adama and Tigh on the defensive.

Adama's proposal for an alliance and a habitable space is met with fierce resistance.

The fleet and its Cylon allies unite in a search for Earth; Saul Tigh, Galen Tyrol, Samuel Anders and Tory Foster discover unsettling keys to their past.

The rebel Cylons hold President Roslin hostage.

As the fleet prepares to battle the Cylons for control of Kobol, the tensions between Adama and Laura explode.

A supply patrol discovers a hospitable planet; Baltar, Lee and Kara find themselves in an awkward triangle.

The return of democracy to the fleet brings with it hardball politics and potentially deadly intrigue.

When fuel supplies dwindle, the fleet must make an attack on a Cylon-controlled tylium mine.

President Laura Roslin fears that Commander Adama might be a Cylon.

When a Cylon is discovered on one of the ships, Adama sends Kara to interrogate the machine.

Baltar faces death and dishonor when a disguised Number Six accuses him of being a traitor.

When a Cylon suicide bomber kills three, Adama must reveal to the public that Cylons now look human.

Adama and Lee put the fleet at risk while searching for Kara.

After a 40-year armistice in the war between the Twelve Colonies and the Cylons, the latter group launches a surprise attack with a goal of exterminating the human race, wiping out virtually everyone in the Twelve Colonies. Malware placed in the Colonial military's computer network renders most of the network ineffective or destroyed -- except for Battlestar Galactica, a space battleship that fought in the earlier war. Because it's older computer systems are not networked, the ship is not affected by the malware attack and it becomes the lead in the new battle with the Cylons.

Set in deep space, the series revolves around the adventures of Dylan Hunt, captain of the Andromeda Ascendant, his crew members, and their efforts to restore the Systems Commonwealth, a government that was responsible for a time of extended peace and prosperity. The sci-fi series is based on previously unused materials written by late writer Gene Roddenberry.

A team of explorers made up of soldiers and scientists travels through a Stargate, an ancient portal to other planets. They use the Stargate to explore new worlds, forge ties with friendly civilizations and protect Earth from hostile forces. The TV series is based on the theatrical film "Stargate."

Led by the brilliant scientist Dr. Nicholas Rush, a band of civilians and soldiers faces a whole new world -- and fights for survival -- after their secret military base is attacked. The survivors emerge aboard an ancient ship, unable to return to Earth and now on a course to parts unknown. Amid the darkness the group must meet its most basic needs of food, water and air while discovering the secrets of the ship's Stargate to ultimately survive.

Within the ruins of the legendary city of Atlantis is buried a secret base left by the Ancients, originators of the Stargate. A new team of explorers travels to the distant galaxy where Atlantis is located, where a primitive human civilization is threatened by a sinister enemy.

A spinoff of "Star Trek: The Next Generation," "Deep Space Nine" is set on a space station near the planet Bajor. This time, Commander Benjamin Sisko is in charge of a diverse crew. But unlike other "Star Trek" series, there's no USS Enterprise to help them. Sisko and the crew must fight off rival alien species who want control of Deep Space Nine because of its strategic position close to a wormhole, which allows speedy travel to the far reaches of space.

Featuring a bigger and better USS Enterprise, this series is set 78 years after the original series -- in the 24th century. Instead of Capt. James Kirk, a less volatile and more mature Capt. Jean-Luc Picard heads the crew of various humans and alien creatures in their adventures in space -- the final frontier.

Hundreds of years in the future, things are different than what we are used to after humans have colonized the solar system and Mars has become an independent military power. Rising tensions between Earth and Mars have put them on the brink of war. Against this backdrop, a hardened detective and a rogue ship's captain come together to investigate the case of a missing young woman. The investigation leads them on a race across the solar system that could expose the greatest conspiracy in human history.