Updated: April 06, 2022

"Island in the Sky" Anton M. Leader Norman Lessing, Shimon Wincelberg September 29, 1965

The family finds a planet able to support human life and the Professor feels they should land there. He decides to first check out the planet himself and goes off in a rocket spacesuit, but his suit malfunctions and contact is lost. Major West tries to land on the planet, but Dr. Smith demands they return to Earth and uses the reprogrammed Robot to force his authority. West manages to subdue Smith but the Jupiter-2 falls from orbit and crashes on the planet. With everyone safe, West leads a mission in the chariot to find the Professor. Meanwhile, Smith schemes a plan to escape the planet and orders the Robot to eliminate all "non-essential personnel."

Note: Some of this episode reuses footage from the original pilot "No Place to Hide".