Continuity mistake: When Dr. Smith is attempting to resuscitate Judy, she is strapped to the bed. Yet when they make the jump into hyperspace, she is suddenly unstrapped and floating. (00:33:30 - 00:35:55)
Continuity mistake: When Penny is sliding down the rope to get the microsealer, she knocks the silver device to the edge of the toolbox. In the subsequent closeup, the silver thing is back in its original place. (01:26:45)
Answer: Presumably, they're still "Lost In Space." The series ended before a final episode was shot. In the 80's, series creator Irwin Allen considered doing a TV reunion movie with the original cast to bring the Robinson family home, but with the unfortunate passing of Guy Williams, the idea kind of fell to the wayside.