The Big Bang Theory introduced a countless number of guest stars during its 12 seasons on CBS. And before the comedy wrapped ...

Riki Lindhome's Ramona Nowitzki had an 8-season gap between appearances on The Big Bang Theory, but bringing her back was essential for Sheldon Cooper's growth.

The Kardashian-Jenners return with a year full of challenges, milestones, and new adventures. With uncertain futures and ...

From playing the fun aunt, Jackie Harris, in the '80s and '90s sitcom Roseanne to tough, hardworking mom Marion McPherson in ...