Dr. McKay reluctantly travels to Earth to attend a scientific demonstration by his former rival.

Richard Woolsey struggles to remain the leader of Atlantis; McKay and Zelenka investigate a mysterious find; Sheppard is captured by an old enemy.

A vengeful foe infiltrates the Gate Room in an attempt to take control of Atlantis.

Sheppard and his team are captured by a newly formed galactic coalition and made to stand trial.

Col. Sheppard and his team struggle to save survivors of the Hoffan plague from being sacrificed to the Wraith.

Dr. Daniel Jackson and Rodney McKay try to keep a reactivated ancient weapon from triggering a cataclysmic chain of events.

Dr. Daniel Jackson travels to Atlantis to enlist Dr. McKay's help in finding the secret lab of a rebellious ancient scientist.

Ronan must use his skills as a former runner in order to save a kidnapped Dr. Keller.

Teyla goes undercover on a mission aboard a wraith hive ship.

While exploring an abandoned catacomb on an unexplored planet, a team discovers one of Michael's secret labs.

Dr. McKay's sister is summoned from Earth when her brother becomes fatally ill on a rescue mission.

A mysterious entity causes power disruptions and threatens Atlantis' technological infrastructure.

A malfunction in the Daedalus results in the team meeting different alien life forms and having to battle.

Ronon is captured by his former friend and turned over to the wraith.

When a mysterious alien organism takes Dr. Keller as its host, Beckett and the crew must search for a serum to save her from the intruder.

Atlantis races to save team members who are trapped in a collapsed compound; a pregnant Teyla begs Kanann to help save her.

Following another unsuccessful search for Teyla, Sheppard returns home to Atlantis to find the city completely abandoned.

An old friend's return spurs a race against time to rescue a missing teammate.

Teyla continues to search for her people; a mysterious illness sweeps through the galaxy.

Col. Carter asks Teal'c to serve as Ronan Dex's mentor before his suitability review by the IOA.

Carter, McKay and Dr. Keller become trapped in an underground mining chamber during an off-world mission.

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.

This update of the late-1970s series takes a decidedly darker tone as what's left of humankind struggles for survival against the robot Cylons, who have killed millions. The Galactica, led by William Adama, protects a patched-together fleet of civilians -- led by de facto president Laura Roslin -- in search of a mythical planet called Earth.

In the tradition of the 1960s cult show of the same name, this anthology series features different actors, many well-known from their previous work, in each episode. The episodes often explore eerie and often supernatural themes with a science-fiction element.

Kathryn Janeway is the captain of a starship that is lost in space and must travel across an unexplored region of the galaxy to find its way back home. On its way, the crew encounters different species they must deal with, but find that all their adventures only make them long for home.