Season 1, Episode 6 Welcome Stranger
The Robinsons are visited by a long-lost astronaut, who agrees to help their children return to Earth. Will: Billy Mumy. John: Guy Williams. Maureen: June Lockhart. Penny: Angela Cartwright. Don: Mark Goddard. Smith: Jonathan Harris.
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- Rating: None
- 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)