I have a soft spot for the last ep of Season 4 of Eureka.
From Wikipedia -
"(This is a holiday special, and takes place outside the main story.) Crashing over Eureka, a wave of color changes the town to animation of multiple styles and cartoonish effects, including Jack's jeep coming alive, Andy being turned into a cartoonish robot, and Jo becoming a princess. All this caused by the Super Photon Generator, a massive holographic matrix meant as Jack's Christmas gift for the kids (with help from Fargo). Meanwhile, Kevin, Zoey, and Jenna opened a gift early called "Holotown", a 'create your own story' book using holograms. It turns out that the gift the kids opened crossed signals with the Super Photon Generator. As the episode goes on, with the main characters aware of the changing animations, the kids add villainous Snow Ninjas to spice up the story. As Jack, Andy, Allison, and Jo make it to the generator, they see Dr. Drummer- a scientist from the last holiday special- trying to fix the generator; but as he is, the snow ninjas join to create a 50 foot snow monster. The kids realize the connection between the generator and their book and give the others a fighting chance with Kevin turning them into Anime to defeat the snow ninja monster. Jack gets Jo close enough to throw a bomb into the monster, blowing it up. As the others fight the Snow Ninja Monster, Allison, Andy, and Dr. Drummer finally repair the generator, returning everyone to normal perspective. At the end of the episode, everyone gets together for a Christmas dinner at the smart house."
|