| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Arthur Heinemann | Crew | Writing | Writer | 1 |
Ben Bova | Crew | Crew | Scientific Consultant | 2 |
Derrett Lee | Crew | Production | Production Coordinator | 2 |
 Douglas Trumbull | Crew | Production | Executive Producer | 2 |
 George McCowan | Crew | Directing | Director | 2 |
Gordon White | Crew | Art | Art Direction | 2 |
 Harlan Ellison | Crew | Writing | Writer, Creator | 1 |
 Harvey Hart | Crew | Directing | Director | 2 |
Jack McAdam | Crew | Production | Production Designer | 2 |
Jerome M. Zeitman | Crew | Production | Executive Producer | 2 |
John Meredyth Lucas | Crew | Writing | Writer | 1 |
Joseph L. Scanlan | Crew | Directing | Director | 1 |
Karen Hazzard | Crew | Production | Casting | 2 |
Leo Orenstein | Crew | Directing | Director | 1 |
Norman Klenman | Crew | Writing | Story Consultant | 2 |
Paul Schneider | Crew | Writing | Writer | 1 |
Shimon Wincelberg | Crew | Writing | Writer | 1 |
William Davidson | Crew | Production | Producer | 2 |
Larry S. Wells | Crew | Costume & Make-Up | Wardrobe Master | 2 |
Carol Davidson | Crew | Costume & Make-Up | Makeup & Hair, Makeup Designer | 1 |
Wally Weaver | Crew | Sound | Sound Re-Recording Mixer | 2 |
Ray Fitzwalter | Crew | Directing | Assistant Director | 2 |
Peter G. Edwards | Crew | Lighting | Lighting Director | 2 |
Bernie Clayton | Crew | Editing | Editor | 1 |
Ed Richardson | Crew | Production | Associate Producer | 2 |
Shirley Mann | Crew | Costume & Make-Up | Costume Design, Costume Designer | 1 |
 Alexandra Bastedo | Cast | Actress | Idona | 1 |
 Angel Tompkins | Cast | Actress | Daphne | 1 |
 Antoinette Bower | Cast | Actress | Dr. Heather Marshall | 1 |
 Barry Morse | Cast | Actor | Shaliff | 1 |
Clive Endersby | Cast | 1st Tube Dweller | 1 | |
 Donnelly Rhodes | Cast | Actor | Roloff | 1 |
 Doug McGrath | Cast | Actor | Sergeant | 1 |
 Ed Ames | Cast | Actor | Mr. Smith | 1 |
 Edward Andrews | Cast | Actor | Linus Farthing | 1 |
 Frank Converse | Cast | Actor | Dr. Gerald W. Aaron | 1 |
 Gay Rowan | Cast | Rachel | 16 | |
George Sperdakos | Cast | Actor | Jubal | 1 |
 Gillie Fenwick | Cast | Actor | Old Abraham | 1 |
 Henry Beckman | Cast | Actor | William | 1 |
 Ivor Barry | Cast | Actor | Chief Rathe Masters | 1 |
 John Colicos | Cast | Actor | The Governor | 1 |
 Kay Hawtrey | Cast | Actress | Garth's Mother | 1 |
 Keir Dullea | Cast | Actor | Devon | 16 |
 Lloyd Bochner | Cast | Actor | Col. M.P. Garoway | 1 |
 Percy Rodriguez | Cast | Actor | Sakharov Richards | 1 |
 Robin Ward | Cast | Actor | Garth | 16 |
 Sean Sullivan | Cast | Actor | Rachel's Father | 1 |
 Simon Oakland | Cast | Actor | Dr. Asgard | 1 |
 Stephen Young | Cast | Actor | Dr. Chris | 1 |
 Sterling Hayden | Cast | Actor | Old Jeremiah | 1 |
Susan Stacey | Cast | Five | 1 | |
Vivian Reis | Cast | Actress | Jane | 1 |
 Walter Koenig | Cast | Actor | Oro | 2 |
 William Hutt | Cast | Actor | Dr. Pete Marshall | 1 |
William Osler | Cast | Computer voice & Host | 2 | |
Aileen Seaton | Cast | Rachel's Mother | 1 | |
Scott Fisher | Cast | Small Boy | 1 | |
James Barron | Cast | Actor | Garth's Father | 1 |
| Person | Type | Job | Role(s) | Episodes |
