Olympus Season 1

The first season of Stargate Olympus began airing with a special two-part premiere on July 31st 2008, with an additional eighteen episodes to add up to a total of 20 episodes.

Regular characters

 * Josh Duhamel as Colonel Nick Thomson (/17 episodes)
 * Kiera Knightley as Dr. Amy Morris (/17 episodes)
 * Majandra Delfino as Irina (/17 episodes)
 * Rachael Taylor as Lt. Sara Mandel (/17 episodes)
 * Bruce Willis as Major General Jonathan Bates (/17 episodes)
 * Jason Isaacs as Brigadier General Tagert Hunt (/17 episodes)
 * Karl Urban as Dr. Alex Schrappen (/17 episodes)
 * Chris O'Donnell as Tian Gelt (/17 episodes)

Recurring characters

 * Ewan McGregor as Dr. Edward Davis (/17 episodes)
 * Chyler Leigh as Dr. Kay Ganson (/17 episodes)
 * Will Smith as Major Aaryn Kast (/17 episodes)
 * Jason Dohring as Dr. Brett Martain (/17 episodes)
 * Jessica Alba as Major/Lt. Colonel Alison Meyers (7/17 episodes)
 * Tahmoh Penikett as Blake Alistair (/17 episodes)
 * Michael Corvin (2/17 episodes)

Guest Stars

 * Richard Dean Anderson as Major General Jack O'Neill
 * Beau Bridges as Major General Henry Landry
 * Ben Browder as Colonel Cameron Mitchell
 * Eric Breker as Colonel Albert Reynolds
 * Gary Jones as CMSgt. Norman Walter Davis Harriman
 * Michael Shanks as Doctor Daniel Jackson
 * Christopher Judge as Teal'c
 * Claudia Black as Vala Mal Doran