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
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The peak run. Top 40% of seasons by average rating — consecutive, with an average of 6.11.
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Guy Williams
Dr. John Robinson
June Lockhart
Dr. Maureen Robinson
Mark Goddard
Major Don West
Marta Kristen
Judy Robinson
Angela Cartwright
Penny Robinson
Bill Mumy
Will Robinson
Jonathan Harris
Dr. Zachary Smith
Dick Tufeld
Robot B-9
Bob May
Robot B-9
All 83 episodes plotted by IMDb rating
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29 episodes • 1965Avg: 6.1Golden Era
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | The Reluctant Stowaway | Sep 15, 1965 | 7.0 |
| 2 | The Derelict | Sep 22, 1965 | 6.5 |
| 3 | Island in the Sky | Sep 29, 1965 | 6.7 |
| 4 | There Were Giants in the Earth | Oct 6, 1965 | 7.0 |
| 5 | The Hungry Sea | Oct 13, 1965 | 6.0 |
| 6 | Welcome Stranger | Oct 20, 1965 | 5.3 |
| 7 | My Friend, Mr. Nobody | Oct 27, 1965 | 6.3 |
| 8 | Invaders from the Fifth Dimension | Nov 3, 1965 | 7.0 |
| 9 | The Oasis | Nov 10, 1965 | 5.7 |
| 10 | The Sky Is Falling | Nov 17, 1965 | 5.3 |
| 11 | Wish Upon a Star | Nov 24, 1965 | 6.3 |
| 12 | The Raft | Dec 1, 1965 | 6.7 |
| 13 | One of Our Dogs Is Missing | Dec 8, 1965 | 6.0 |
| 14 | Attack of the Monster Plants | Dec 15, 1965 | 5.8 |
| 15 | Return from Outer Space | Dec 29, 1965 | 6.3 |
| 16 | The Keeper (1) | Jan 12, 1966 | 6.7 |
| 17 | The Keeper (2) | Jan 19, 1966 | 6.7 |
| 18 | The Sky Pirate | Jan 26, 1966 | 5.5 |
| 19 | Ghost in Space | Feb 2, 1966 | 6.0 |
| 20 | War of the Robots | Feb 9, 1966 | 6.7 |
| 21 | The Magic Mirror | Feb 16, 1966 | 6.3 |
| 22 | The Challenge | Mar 2, 1966 | 6.0 |
| 23 | The Space Trader | Mar 9, 1966 | 5.3 |
| 24 | His Majesty Smith | Mar 16, 1966 | 5.3 |
| 25 | The Space Croppers | Mar 30, 1966 | 5.0 |
| 26 | All That Glitters | Apr 6, 1966 | 5.3 |
| 27 | The Lost Civilization | Apr 13, 1966 | 6.0 |
| 28 | A Change of Space | Apr 20, 1966 | 5.5 |
| 29 | Follow the Leader | Apr 27, 1966 | 7.0 |
30 episodes • 1966Avg: 5.3Valley of Despair
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | Blast Off into Space | Sep 16, 1966 | 6.0 |
| 2 | Wild Adventure | Sep 21, 1966 | 5.3 |
| 3 | The Ghost Planet | Sep 28, 1966 | 5.7 |
| 4 | Forbidden World | Oct 5, 1966 | 5.2 |
| 5 | Space Circus | Oct 12, 1966 | 5.5 |
| 6 | The Prisoners of Space | Oct 19, 1966 | 6.8 |
| 7 | The Android Machine | Oct 26, 1966 | 6.0 |
| 8 | The Deadly Games of Gamma 6 | Nov 2, 1966 | 4.5 |
| 9 | The Thief from Outer Space | Nov 9, 1966 | 5.0 |
| 10 | The Curse of Cousin Smith | Nov 16, 1966 | 5.0 |
| 11 | West of Mars | Nov 11, 1966 | 5.0 |
| 12 | A Visit to Hades | Dec 7, 1966 | 5.0 |
| 13 | The Wreck of the Robot | Nov 14, 1966 | 6.0 |
| 14 | The Dream Monster | Dec 21, 1966 | 6.0 |
| 15 | The Golden Man | Dec 28, 1966 | 7.0 |
| 16 | The Girl From the Green Dimension | Jan 4, 1967 | 4.0 |
| 17 | The Questing Beast | Jan 11, 1967 | 4.0 |
| 18 | The Toymaker | Jan 25, 1967 | 4.0 |
| 19 | Mutiny in Space | Feb 1, 1967 | 4.5 |
| 20 | The Space Vikings | Feb 8, 1967 | 5.0 |
| 21 | Rocket to Earth | Feb 15, 1967 | 5.0 |
| 22 | The Cave of the Wizards | Feb 22, 1967 | 6.0 |
| 23 | Treasure of the Lost Planet | Mar 1, 1967 | 5.0 |
| 24 | Revolt of the Androids | Mar 8, 1967 | 6.0 |
| 25 | The Colonists | Mar 15, 1967 | 5.0 |
| 26 | Trip Through the Robot | Mar 22, 1967 | 6.0 |
| 27 | The Phantom Family | Mar 29, 1967 | 6.0 |
| 28 | The Mechanical Men | Apr 5, 1967 | 6.0 |
| 29 | The Astral Traveler | Apr 12, 1967 | 5.0 |
| 30 | The Galaxy Gift | Apr 26, 1967 | 5.0 |
24 episodes • 1967Avg: 5.6
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | Condemned of Space | Sep 6, 1967 | 6.0 |
| 2 | Visit to a Hostile Planet | Sep 13, 1967 | 7.0 |
| 3 | Kidnapped in Space | Sep 9, 1967 | 6.0 |
| 4 | Hunter's Moon | Sep 27, 1967 | 6.0 |
| 5 | The Space Primevals | Oct 4, 1967 | 6.0 |
| 6 | Space Destructors | Oct 11, 1967 | 6.0 |
| 7 | The Haunted Lighthouse | Oct 18, 1967 | 5.5 |
| 8 | Flight into the Future | Oct 25, 1967 | 6.0 |
| 9 | Collision of Planets | Nov 8, 1967 | 4.0 |
| 10 | Space Creature | Nov 15, 1967 | 6.0 |
| 11 | Deadliest of the Species | Nov 22, 1967 | 5.0 |
| 12 | A Day at the Zoo | Nov 29, 1967 | 5.0 |
| 13 | Two Weeks in Space | Dec 13, 1967 | 5.0 |
| 14 | Castles in Space | Dec 20, 1967 | 5.0 |
| 15 | The Anti-Matter Man | Dec 27, 1967 | 5.0 |
| 16 | Target: Earth | Jan 3, 1968 | 6.0 |
| 17 | Princess of Space | Jan 10, 1968 | 5.0 |
| 18 | Time Merchant | Jan 17, 1968 | 5.0 |
| 19 | The Promised Planet | Jan 24, 1968 | 5.0 |
| 20 | Fugitives in Space | Jan 31, 1968 | 6.0 |
| 21 | Space Beauty | Feb 14, 1968 | 4.0 |
| 22 | The Flaming Planet | Feb 21, 1968 | 7.0 |
| 23 | The Great Vegetable Rebellion | Feb 28, 1968 | 7.0 |
| 24 | Junkyard in Space | Mar 6, 1968 | 6.0 |
