*Gil Gerard as Capt. William "Buck" Rogers
- Erin Gray as Col. Wilma Deering
- Tim O'Connor as Dr. Elias Huer
- David Groh as Major Duke Danton
- Roddy McDowall as Governor Saroyan
- Brianne Leary as Ryma
- Macdonald Carey as Dr. Mallory
- Karen Carlson as Stella Warden
- Michael Mullins as Regis Saroyan
- Buster Crabbe as Brigadier Gordon
- Jack Palance as Kaleel
- Felix Silla as Twiki
- Mel Blanc as Voice of Twiki
- Robert Dowdell as Galen
- Sheila Wills as Major Fields
- Don Marshall as Julio
- Diane Markoff as Female Pilot
- June Whitley Taylor as Woman
- Borah Silver as Husband
- Michael Masters as Worker
- Don Maxwell as Guard
- Nathaniel Brian Wine as Technician
- William Conrad as Voice of Narrator (uncredited)
- Eric Server as Voice of Dr. Theopolis (uncredited)
Episode Crew
- Directed by Michael Caffey
- Teleplay by Steve Greenberg, Aubrey Solomon and Anne Collins
- Story by Steve Greenberg and Aubrey Solomon
- Produced by Jock Gaynor, Medora Heilbron, Bruce Lansbury, Glen A. Larson, David J. O'Connell and David G. Phinney
- Music by Johnny Harris
- Cinematography by Ben Colman
- Film Editors - Michael Berman and Leon Ortiz-Gil
- Casting - Phil Benjamin
- Art Directors - Fred Luff III and Paul Peters
- Set Decorators - Victor Hugo and Frank Lombardo
- Costume Designer - Sal Anthony