Lost in the same stories!
Season 3 Ep 15
The Anti-Matter Man
John Robinson and Don West are transported onto a strange new world where their evil opposites exist and plan to change places with them. Will, The Robot and a reluctant Dr. Smith set out to find and help the real Don and John only to be pursued by a evil John Robinson.
Season 3 Ep 16
Target: Earth
Landing on a planet some shapeless beings duplicate the Robinsons and take the Jupiter 2 with the intent of conquering Earth. Will gets aboard to stop them.
Both had the same premise - evil versions of the Robinsons. The ending of The Anti-Matter Man had a preview of the next episode which featured, yep, *another* evil John Robinson and Don West. Irwin Allen didn't even try to disguise this by changing the order of the episodes.
Irwin Allen... master of the rehash. share