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Jonathan Harris as Dr. Zachary Smith (voice) |
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Sherry Alberoni as Deanna Carmichael (voice) |
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Michael Bell as Craig Robinson (voice) |
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Don Messick as The Robot / Brack / Narrator (voice) |
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Vincent Van Patten as Linc Robinson (voice) |
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Sidney Miller as Lar / Tyrano Twin One (voice) |
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Ralph James as Tyrano Twin Two (voice) |
| Writing | Irwin Allen | Original Series Creator |
| Production | William Hanna | Executive Producer |
| Production | Joseph Barbera | Executive Producer |
| Writing | Fred Freiberger | Writer |
| Directing | Charles August Nichols | Director |
| Sound | Hoyt Curtin | Music |
