S:3 E:16
Target: Earth
Will tries to brew dissension among shapeless aliens who plan to conquer Earth. Robot: Bob May. John: Guy Williams. Don: Mark Goddard. Smith: Jonathan Harris. Maureen: June Lockhart. Judy: Marta Kristen. Penny: Angela Cartwright., A race of shapeless aliens transforms themselves into exact doubles of the Robinsons, kidnapping the originals and reprogramming the Robot for evil. It is all part of a scheme to take over the earth with similar replicants. Escaping from their captors’ clutches, Will Robinson (Billy Mumy) and Dr. Smith (Jonathan Harris) take the places of their lookalikes in order to foment dissension amongst the aliens and reclaim the Jupiter 2. The highlight of this episode is a side trip to Chicago, which though supposedly set in 1999 looks exactly like the Windy City of 1968!, The Robinsons encounter a race of blob creatures, intent on conquering Earth.
