This, the second Superman cartoon made by Max and Dave Fleischer, was another exciting adventure that provided enough entertainment for a 6-minute short. In this one, giant robots rob jewels for their master. When Lois and Clark find out, the former of course has to investigate. So when Superman arrives in the nick of time to save her, he does so with no real danger to himself as evidenced when he uses his cape to siphon the molten lava meant to kill Ms. Lane. Also, this was the first time Supes uses his x-ray vision on film. I thought this was a little better than the first one so on that note, The Mechanical Monsters comes highly recommended.