Season
- Season 3 1967-09-06
- Season 2 1966-09-16
- Season 1 1965-09-15
- Season 0
Episode
- Episode 1: The Reluctant Stowaway
- Episode 2: The Derelict
- Episode 3: Island in the Sky
- Episode 4: There Were Giants in the Earth
- Episode 5: The Hungry Sea
- Episode 6: Welcome Stranger
- Episode 7: My Friend, Mr. Nobody
- Episode 8: Invaders from the Fifth Dimension
- Episode 9: The Oasis
- Episode 10: The Sky Is Falling
- Episode 11: Wish Upon a Star
- Episode 12: The Raft
- Episode 13: One of Our Dogs Is Missing
- Episode 14: Attack of the Monster Plants
- Episode 15: Return from Outer Space
- Episode 16: The Keeper (1)
- Episode 17: The Keeper (2)
- Episode 18: The Sky Pirate
- Episode 19: Ghost in Space
- Episode 20: War of the Robots
- Episode 21: The Magic Mirror
- Episode 22: The Challenge
- Episode 23: The Space Trader
- Episode 24: His Majesty Smith
- Episode 25: The Space Croppers
- Episode 26: All That Glitters
- Episode 27: The Lost Civilization
- Episode 28: A Change of Space
- Episode 29: Follow the Leader
Lost in Space Season 1 Return from Outer Space
The space family Robinson is sent on a five-year mission to find a new planet to colonise. 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 endless stream of abuse from Dr. Smith, but is a trusted companion of young Will Robinson
