I thought I had seen all their episodes on Hulu but I must have skipped this one before. Glad I saw it today. I think I may have watched it on TV in re-runs back in the 1980s.

This is a fun episode, without getting into the heavy camp of seasons 2 and 3. It includes the usual logic holes and inconsistencies such as Will telling Penny "I'll let you have the first move" when she's sitting in front of white which always moves first in chess.The beginning is the template for the dynamic between Smith and Will. Smith has a willing assistant who helps him in an adventure Smith is too timid to undertake himself, while Will gets to enjoy being the adult-like "I can handle things" guy while he's with Smith.It's great to see Will at the extreme of smart. He's normally smart but polite, offering suggestions which often work such as the time he suggested to Dad and Don to bypass the Chariot ignition when it wouldn't start as the lava was bearing down on them. But super genius Will is arrogant and, at times, meanAncient Smith is hilarious.

Interesting idea, but it seemed to drag for me. The whole thing was rather inert until the scaly alien showed up toward the end shouting like a drunken street person. Interesting design for the space vehicles, though; they look like space-suit helmets! Can't believe they spent the money on two of them. And at least Jonathan Harris got to stretch a little with his old man bit in this one, and Mark Goddard seemed to be genuinely getting a kick out it. Hey, maybe I'm projecting, but in some of these ya gotta take your enjoyment where you can get it. And Judy's new togs still seem cool some 43 years later.

Fairly good epsisode with Will transformed into a boy genius who is a real pain and Dr. Smith becomes an old, feeble man. You also get a Scaley Creature who's angry over his stole spacecraft.
Nicely paced and written, this episode scores a few amusing points. Not too far out or campy, either.