We're Back!: A Big Banger's Story

Cast

 * Leonard Hofstader (The Big Bang Theory) as Rex
 * Howard Wolowitz, Rajesh 'Raj' Koothrappali and Bernardette Rostenkowski-Holowitz (The Big Bang Theory) as Woog
 * Sheldon Cooper and Amy Farrah Fowler (The Big Bang Theory) as Dweeb
 * Penny (The Big Bang Theory) as Elsa