“The Big Bang Theory” was one of Courtney’s first acting roles. Since the gig, she has acted in a few other — mostly minor — roles.
In 2013-2015, she acted as Claudia in the hit CBS sitcom “Mom,” where she acted alongside Anna Faris and Allison Janney. In 2018, she became a series regular as Amanda LaRusso in the Netflix hit “Cobra Kai.”
Eliza Dushku as Angela Page – Now
Eliza definitely didn’t start her career in TBBT. When she made her appearance on the series, she was already a well-known name in Hollywood.
She played Missy Pantone in the popular cheerleading movie "Bring It On," as well as Faith in the "Angel" and "Buffy the Vampire Slayer" Series. She had a lead role in the Fox series "Dollhouse" as Echo and another lead as Tru in "True Calling." She hasn't been acting since 2017.
Courtney Henggeler as Missy Cooper – Then
Missy is Sheldon’s fraternal twin sister, who is completely different than her brother. While she is very charming and amicable, Sheldon is anything but. She is introduced in the first season, with Leonard, Howard, and Raj all crushing on her.
The men fall over each other, trying to win her attention, and Sheldon tells them that he will choose who gets to date her. Missy finds an ally with Penny, and while they are hanging out at her apartment, each of the guys tries their luck at asking her out, but none of them are successful.
John Ross Bowie as Barry Kripke – Then
Barry Kripke Ph.D. is a Caltech plasma-physicist-turned-string-theorist and Leonard and Sheldon’s colleague. He is impressively smart and has Rhotacism, which is also kind of cute, but he can be obnoxious, knowing exactly how to tick people off.
Nonetheless, he is quite talented and therefore appreciated (even if not entirely liked) by Sheldon, Howard, Leonard, and Raj. He first appeared in the show during season 2 and has kept appearing in later seasons as well.
John Ross Bowie – Now
John is most well known for his part on TBBT, but he has made himself well known even outside of the series.
He is a regular sketch comedy performer and is very present in the world of comedy, both writing and performing sketches. He has also acted in several films such as "He’s Just Not That Into You" and "What the Bleep Do We Know?"