Space: 1999/Trivia
- Hey, It's That Guy!
- Martin Landau and Barbara Bain were both regulars on Mission: Impossible before starring on Space: 1999
- Barry Morse played Lt. Gerard on The Fugitive before he played Prof. Bergman.
- Season One guest stars:
- "Earthbound" guest-stars Christopher Lee.
- "Missing Link" guest-stars Peter Cushing.
- "Guardian of Piri" guest-stars Catherine Schell (the Bond Girl in On Her Majesty's Secret Service) - in a case of You Look Familiar, she would return in Season Two to play Maya.
- "Force of Life" guest-stars Ian McShane, who would go on to play the title character in Lovejoy, Al Swearengen in Deadwood, and Dr. Robert Bryson in Babylon 5: The River of Souls.
- "Alpha Child" guest-stars Julian Glover, the '80s go-to bad guy (For Your Eyes Only, The Empire Strikes Back, Indiana Jones and the Last Crusade, etc.).
- "Death's Other Dominion" guest-stars Brian Blessed in a relatively restrained performance.
- "The Infernal Machine" guest-stars Leo McKern (Rumpole of the Bailey, The Prisoner, etc.).
- "Mission of the Darians" guest-stars Joan Collins.
- Season Two guest stars:
- You Look Familiar: "The Metamorph" guest-stars BRIAN BLESSED!
- "One Moment of Humanity" guest-stars Billie Whitelaw (The Omen).
- Back to Space: 1999