Season 1, Episode 7 My Friend, Mr. Nobody

Penny discovers a deep cave inhabited by an invisible---but friendly---voice. John: Guy Williams. Smith: Jonathan Harris. Maureen: June Lockhart. Will: Billy Mumy. Don: Mark Goddard.

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  • Premise: The space family Robinson is sent on a five-year mission to find a new planet to colonize, but the voyage is sabotaged time and again by an inept stowaway, Dr. Zachary Smith. The family's spaceship, Jupiter II, also carries a friendly robot who endures an… (more)

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