This is a special episode and somehow accidentally copied into Season 8 too.
http://trakt.tv/shows/robot-chicken/seasons/0/episodes/17
This was fun. The show doesn't do one-story episodes very often, but they still managed to pack a number of homages in there. The best of them was the Tom Hanks Polar Express riffs, but the silly action movie stuff was fun too, and had a lot of the dark humor that's characteristic of the show.
Shout by Andrew BloomVIP 9BlockedParent2016-01-22T18:50:59Z
Please ignore my other comment on this episode. It was meant for the X-mas special, and trakt got mixed up with the numbering.
This was a mixed bag of an episode. There were some great little gags like the salmon returning to Spawn, or the no-shirt no-shoes no service guy during the Purge, but the major sketches like The Predator/Bachelor mash up and the Ex-Men mash up fell pretty flat. One of those "stay for the side dishes, but ignore the main course" episodes.