The Promised Planet

The Robot suddenly announces that the Jupiter II is approaching Alpha Centauri. Everyone is suprised, and the ship lands on a planet, where they are greeted by a group of people who appear to be teenagers from Earth. It turns out that they are aliens who live like Earth-style hippies, and they are incapable of growing old. They want to age normally, and to do this they want to get the older members of the Robinson party to leave in the Jupiter II while the younger members can stay behind and be used in an experiment that will make it possible for them to do so. The aliens trick the older members of the Robinson party into leaving, but Will pulls a fast one on the aliens and the Jupiter II eventually returns to the planet, and Penny, Will, and Dr. Smith, who somehow passed himself off as a young person, are rescued.

Writing:
  • Irwin Allen
  • Anthony Wilson

Stars:
Release Date: 1965-09-15
Seasons: 1 2 3
TMDb: 7.1/10
  • Country: US
  • Language: English
  • Runtime: 60

Other episodes for this season

Condemned of Space
Episode 1 - Condemned of Space
Visit to a Hostile Planet
Episode 2 - Visit to a Hostile Planet
Kidnapped in Space
Episode 3 - Kidnapped in Space
Hunter's Moon
Episode 4 - Hunter's Moon
The Space Primevals
Episode 5 - The Space Primevals
Space Destructors
Episode 6 - Space Destructors
The Haunted Lighthouse
Episode 7 - The Haunted Lighthouse
Flight into the Future
Episode 8 - Flight into the Future
Collision of Planets
Episode 9 - Collision of Planets
Space Creature
Episode 10 - Space Creature
Deadliest of the Species
Episode 11 - Deadliest of the Species
A Day at the Zoo
Episode 12 - A Day at the Zoo
Two Weeks in Space
Episode 13 - Two Weeks in Space
Castles in Space
Episode 14 - Castles in Space
The Anti-Matter Man
Episode 15 - The Anti-Matter Man
Target: Earth
Episode 16 - Target: Earth
Princess of Space
Episode 17 - Princess of Space
Time Merchant
Episode 18 - Time Merchant
The Promised Planet
Episode 19 - The Promised Planet
Fugitives in Space
Episode 20 - Fugitives in Space
Space Beauty
Episode 21 - Space Beauty
The Flaming Planet
Episode 22 - The Flaming Planet
The Great Vegetable Rebellion
Episode 23 - The Great Vegetable Rebel...
Junkyard in Space
Episode 24 - Junkyard in Space