Robot Chicken - Season 8 - Eps 7: The Robot Chicken Christmas Special: X-MAS UNITED
The minds behind Robot Chicken expose a deep dark family secret, and we learn that nothing will ever be the same when the Robot Chicken Nerd discovers his true father is…Father Christmas! And then a lot of people die.
About Robot Chicken

Title: Robot Chicken
First Air Date: 2005-02-20
Last Air Date: 2022-04-11
Status: Ended
Rating: 7.632/10 (from 511 votes)
Language: EN
Seasons: 12
Total Episodes: 218
Network: Adult Swim
Genres: Comedy, Animation
Production Companies: Williams Street, Stoopid Buddy Stoodios, Sony Pictures Digital, Stoopid Monkey, ShadowMachine, Sony Pictures Television
Synopsis
A series of pop-culture parodies using stop-motion animation of toys, action figures and dolls. The title character was an ordinary chicken until he was run down by a car and subsequently brought back to life in cyborg form by mad scientist Fritz Huhnmorder, who tortures Robot Chicken by forcing him to watch a random selection of TV shows, the sketches that make up the body of each episode.
Cast

Seth Green
Various (voice)

Matthew Senreich
Various (voice)

Breckin Meyer
Various (voice)