Interesting plot. It really goes all the way when the Professor and June Cleaver (er, Maureen) along with Don and Judy forget Will and Penny. It's a really dark moment "that would be OK, if we were your parents..."
Professor Robinson almost swears before he catches himself. He wants to find out what the...then catches himself before dropping the f bomb.
Where does Hollywood find the creepy kids like the one who plays Edgar, or the one who was in the early scene in Jurassic Park when the doctor scared him with the raptor claw?
Odd that nobody noticed the timing issue. They've been gone about three years according to what's been said in the series, but the supposed colony has been there for three years. They were the pioneers. How would there be a colony there since they departed Earth? That's Irwin Allen at his "don't talk to me about logic" best.
Nice episode.