Genre: Science Fiction, Adventure, Fantasy
Premise: The Robinson family was supposed to set off on a five-year mission to explore a distant planet, but an act of sabotage by the scheming Dr. Zachary Smith -- who managed to get himself trapped aboard the spaceship -- leaves them adrift in space for three years. The Robinsons, pilot Don West, Dr. Smith and their trusty robot move from planet to planet, always searching for a way to return to Earth.
S03, E15 (First Aired: Dec. 27, 1967)
John's evil counterpart from an anti-matter universe tries to usurp his place in the family.
S03, E16 (First Aired: Jan. 3, 1968)
Aliens make duplicates of the Robinson party to pilot Jupiter 2 and conquer the Earth.