Review: Great episode, I was laughing throughout most of it. The parody of Willy Wonka was great. The songs were hysterical. The running joke of how discussing the Umpalumpa things was hysterical. As was finding out they were basicly slaves (the book gives the back story about the Umpalumpas so you find out why they work at the factory) The X-ray flashlight was hysterical ("Ok, Everyone get on goggles" then puts on radiation suit) and the characterization was well done. So this is easily an A episode.
References:
Aliens: The Worm Queen's body looks like the Alien Queen's swollen ovipositor. The Slurm comes out of the end almost exactly like it did when she lays an egg in the movie. In Aliens you only see it in one shot, right after that Ripley gets pissed and throws a bunch of grenades into it.