 | June Lockhart | ... | Maureen Robinson (84 episodes, 1965-1968) |
 | Mark Goddard | ... | Maj. Don West / ... (84 episodes, 1965-1968) |
 | Marta Kristen | ... | Judy Robinson (84 episodes, 1965-1968) |
 | Bill Mumy | ... | Will Robinson (84 episodes, 1965-1968) |

| Angela Cartwright | ... | Penny Robinson (84 episodes, 1965-1968) |
 | Guy Williams | ... | Prof. John Robinson / ... (83 episodes, 1965-1968) |

| Jonathan Harris | ... | Dr. Zachary Smith / ... (83 episodes, 1965-1968) |
 | Bob May | ... | The Robot (83 episodes, 1965-1968) |
 | Dick Tufeld | ... | The Robot (83 episodes, 1965-1968) |
 | Dawson Palmer | ... | Monster / ... (16 episodes, 1965-1967) |
 | John Hunt | ... | Saticon #2 / ... (7 episodes, 1966-1968) |
 | Jim Mills | ... | Voices / ... (5 episodes, 1966-1968) |
 | Harry Monty | ... | First Midget / ... (5 episodes, 1966-1968) |

| Joe E. Tata | ... | Computer Eye / ... (5 episodes, 1967) |
 | Paul Kessler | ... | Saticon #3 / ... (4 episodes, 1966-1968) |
 | Fred Krone | ... | Alien Monster / ... (4 episodes, 1967-1968) |
 | Jeffrey Trayler | ... | Alien Soldier #2 / ... (4 episodes, 1967-1968) |
 | Sheila Allen | ... | Aunt Gamma / ... (3 episodes, 1965-1968) |
 | Paul Zastupnevich | ... | Bearded Foreign Correspondent / ... (3 episodes, 1965-1967) |
 | Don Forbes | ... | TV Commentator (3 episodes, 1965) |
 | Dee Hartford | ... | Verda / ... (3 episodes, 1966-1968) |
 | Ronald Weber | ... | Alien Dictator / ... (3 episodes, 1966-1968) |
 | Fritz Feld | ... | Zumdish / ... (3 episodes, 1966-1967) |
 | Ron Gans | ... | Alien Leader / ... (3 episodes, 1966-1967) |
 | Mike Donovan | ... | Hades Monster / ... (3 episodes, 1966) |
 | Bart La Rue | ... | Alien #2 / ... (3 episodes, 1967-1968) |
 | Brett Parker | ... | Security Guard (2 episodes, 1965-1968) |
 | Keith Taylor | ... | Edgar / ... (2 episodes, 1965-1968) |
 | Don Matheson | ... | IDAK Alpha 12 / ... (2 episodes, 1965-1967) |
 | William Bramley | ... | Mr. Nobody / ... (2 episodes, 1965-1966) |
 | Theodore Lehmann | ... | Alien / ... (2 episodes, 1965-1966) |
 | Janos Prohaska | ... | Giant Bird Monster / ... (2 episodes, 1965-1966) |
 | Lamar Lundy | ... | The Giant / ... (2 episodes, 1965) |
 | Robert 'Big Buck' Maffei | ... | The Giant Cyclops (2 episodes, 1965) |
 | Ford Rainey | ... | The President (2 episodes, 1965) |
 | Frank Delfino | ... | Second Midget / ... (2 episodes, 1966-1967) |
 | Sue England | ... | Female Robot / ... (2 episodes, 1966-1967) |
 | Michael Fox | ... | Alien on Computer Screen / ... (2 episodes, 1966-1967) |
 | Eldon Hansen | ... | Robot Guard / ... (2 episodes, 1966-1967) |
 | Vitina Marcus | ... | Athena / ... (2 episodes, 1966-1967) |
 | Tiger Joe Marsh | ... | Elevator Operator / ... (2 episodes, 1966-1967) |
 | Robby the Robot | ... | Robot / ... (2 episodes, 1966-1967) |
 | Albert Salmi | ... | Alonzo P. Tucker / ... (2 episodes, 1966-1967) |
 | Wilbur Evans | ... | Lighted Head Leader (2 episodes, 1966) |
 | Allan Melvin | ... | Enforcer Claudio / ... (2 episodes, 1966) |
 | Gregory Morton | ... | Canto of Quasti / ... (2 episodes, 1966) |
 | Michael Rennie | ... | The Keeper (2 episodes, 1966) |
 | Robert Foulk | ... | Cragmire / ... (2 episodes, 1967-1968) |
 | Marcel Hillaire | ... | Junkman / ... (2 episodes, 1967-1968) |
 | Leonard Stone | ... | Farnum (2 episodes, 1967-1968) |
 | Larry Dean | ... | Mummy / ... (2 episodes, 1967) |
 | Ralph Madlener | ... | Monster #2 / ... (2 episodes, 1968) |
|
| Guy Della-Cioppa | .... | executive in charge of production: Van Bernard Productions (84 episodes, 1965-1968) |
| William Self | .... | executive in charge of production / in charge of production / ... (84 episodes, 1965-1968) |
| George E. Swink | .... | post-production supervisor (84 episodes, 1965-1968) |
| Jack Sonntag | .... | production supervisor (69 episodes, 1965-1968) |
| Hal Herman | .... | unit production manager (30 episodes, 1965-1966) |
| Ted Butcher | .... | unit production manager (23 episodes, 1967) |
| James M. Walters Jr. | .... | unit production manager (16 episodes, 1967-1968) |
| Gaston Glass | .... | production manager (15 episodes, 1965) |
| Norman Henry | .... | unit production manager (15 episodes, 1966) |
| |
|
| Leonard A. Engel | .... | supervising music editor (84 episodes, 1965-1968) |
| Lionel Newman | .... | music supervisor / music supervision / ... (84 episodes, 1965-1968) |
| John Williams | .... | composer: theme music / composer: stock music / ... (79 episodes, 1965-1968) |
| Joe Ruby | .... | music editor (58 episodes, 1965-1967) |
| Herman Stein | .... | composer: stock music (32 episodes, 1965-1967) |
| George Probert | .... | music editor (24 episodes, 1967-1968) |
| Bernard Herrmann | .... | composer: stock music (8 episodes, 1965-1967) |
| Richard LaSalle | .... | composer: additional music / composer: stock music (2 episodes, 1965-1967) |
| Cyril J. Mockridge | .... | composer: stock music (2 episodes, 1965-1966) |
| Alexander Courage | .... | composer: stock music (2 episodes, 1966) |
| Leigh Harline | .... | composer: stock music (2 episodes, 1966) |
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