The Big Bang Theory is adding two huge names to the cast for the second half of its final season.
The Big Bang Theory announced Wednesday that actors Kal Penn and Sean Astin will be guest starring in an upcoming episode of the final season.
Penn and Astin will play physicists who by accident confirm Sheldon and Amy’s super-asymmetry theory, which could have a major impact on how things turn out. There is no word yet on when the episode featuring Penn and Astin will air.
The casting news comes a day before Big Bang Theory kicks off the second half of their twelfth and final season, and as it remains the No. 1 comedy on television among total viewers.
There were reportedly discussions about a 13th season, but they never materialized. The five original actors are set to make around $900,000 per episode for the 12th season
Big Bang will return with a new episode on Thursday titled, “The Paintball Scattering.”
The episode description reads: “Penny and Leonard (Johnny Galecki) organize a paintball game that results in mayhem when Sheldon (Jim Parsons) is jealous of Amy (Mayim Bialik). Also, Koothrappali (Kunal Nayyar) catches Anu (Rati Gupta) with her ex-boyfriend and Stuart (Kevin Sussman) doesn’t want to move in with Denise (Lauren Lapkus).”