The Robot Chicken Christmas Special: The X-Mas United

Seth Green

The Nerd / Santa Claus / Rudolph / Hermey the Elf (voice)

Jim Hanks

Polar Express Conductor (voice)

Scott Porter

Chris Evans (voice)

Michaela Watkins

Nerd's Mom (voice)

Henry Winkler

Nerd's Dad (voice)

James Wolk

Del Griffith / Fred Claus (voice)