best show ever!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

This was a great episode, like most Lost in Space. Also, I noticed that this evil robot was Smiley on season 2 episode 27 of "The Addam's Family". Lost in Space is always so predictable in a good way. Like don't you just know before Will repairs the robot that he will be evil? Great forshadowing, though!

A Penny-free epsidose. She alledgely was on rock-samples epsidtion!! I agree with some of these other reviews. The episode is solid but NOT the best of season one.
The Robbie the Robt is too big and clumbsy to have been on this show. And he moves so slowly!!! The robotic coflict is a good one, though. But of course, or Robt saves the day!
Bonus: 50's atmospheric music from those old sci-fi flicks lends a nice touch.

Though this wasn't my favorite episode by any means, it was one that stood out in memory because of Robbie the Robot. Sorry LIS,, but I was rooting for Robbie. I had always thought that Irwin Allen should have purchased Robbie (costume) for LIS to begin with - because let's face it, he's just so damn cool looking, almost by even today's standards. He made an appearance on a Twilight Zone episode as well. Robbie had a cameo appearance in the movie Gremlins (at the inventor's convention scene) - I never liked the idea of the LIS robot mysteriously gaining "emotions" cracking wise, or dishing out morel banter. (at least in the movie, such behavior was explained by Will's personal programming - though I'm not a fan of the movie.) I guess if LIS was recreated by today's standards, the robot would have an "artificial intelligence" therefore could havethe excuse of android-like emotions - but this is a robot, not an android - a machine, like your washer or dryer (with a better computing system) but a machine, none-the-less. Even number 5 didn't come to be alive until "Godly" intervention took place with a lightning bolt. What struck me as hilarious in this episode, was the fact that: here they are, a group of scientists stranded on a alien planet, come across an alien robot, and have so little interest in it's discovery, as to dismiss it for morning biscuits. lol. They are struggling to survive on this bleak world, and dismiss an opportunity to reactivate another "helpful" hand because they already have one. lol. Also - after restored, the writers gave little if any explanation as to the Robinson's suspicions of Robbie's intentions before they decided he was "evil." "Oh thank you, Robbie, you are very helpful." (and in the same breath) "I wish I never activated you, I hate you." In conclusion, I must point out - that this is the first time I noticed that the problems of our hapless space family was not caused by Dr. Smith this time. And also - it was the most work, I've seen Dr. Smith perform.

Who couldn't love a brave, heroic robot? Even Dr. Smith had to show some love for his metallic friend in the end! :)

One of my favorite episodes of "Lost in Space", and probably the best from the first season... Will finds an old "robotoid" and reactivates it much to the jealousy of the family robot, but soon the helpful and superior machine is up to no good when it calls its true master – an alien who wishes to abduct the Robinson family for some sinister experiment. Despite the typical cheesy effects, including the alien who appears as nothing more than a bad Halloween mask, we get to see Robby the Robot – a reuse of robot costume from the classic sci-fi film "Forbidden Planet" – get into a showdown with our robotic hero from "Lost in Space". What could be better? The interaction of Dr. Smith and Robot here is especially humorous. I recommend this episode for any fan of L.I.S.