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The Big Bang Theory Series Cast: Supporting Cast

Main Cast
Supporting Cast

Barry Kripke

(as portrayed by John Ross Bowie)

Openly hostile co-worker to both Leonard and Sheldon. Suffers from rhotacism, an inability to properly pronounce "r" sounds (such as interest from below quote).
"I would say ... I have no intewest in becoming your fwiend."

Bernadette

(as portrayed by Melissa Rauch)

Waitress, microbiology graduate student, and romantic partner to Howard Wolowitz.
"A puppy once bit my face."

Chen

(as portrayed by James Hong)

Waiter at a local Chinese restaurant (possibly Szechuan Palace) frequented by the main cast.
"Where's your annoying little friend who thinks he speaks Mandarin?"

Dr. Eric Gablehauser

(as portrayed by Mark Harelik)

Caltech Department Head and potential romantic partner to Mary Cooper, Sheldon's mother.
"Sheldon, shouldn't you be working?"

Dr. Leslie Winkle

(as portrayed by Sara Gilbert)

Particle Physicist and sometimes sexual partner to Leonard Hoftstadter and Howard Wolowitz.
"Well, if I weren't controlling you with new equipment and research trips, then I'd be uncomfortable."

Dr. V.M. Koothrappali

(as portrayed by Brian George)

Doctor of gynecology and father to Rajesh.
"Lift up the camera--I'm looking at his crotch."

Kurt

(as portrayed by Brian Wade)

Ex-boyfriend to Penny and hulking bully to intellectual superiors, Leonard and Sheldon.
"Why don't you go hop off on a quest, I'm talking to Penny here."

Mary Cooper

(as portrayed by Laurie Metcalf)

Texan mother to Sheldon, Missy, and another unnamed son. She is also a fundamentalist Christian and potential romantic interest of Dr. Gablehauser.
"All that science stuff, that comes from Jesus."

Mrs. Beverly Hofstadter

(as portrayed by Christine Baranski)

Neuroscientist, psychiatrist, and mother to Leonard. She maintains a peculiar, almost tender and borderline romantic relationship with Sheldon.
"An outmoded theory, of course, but the boy did spend most of his waking hours with a tight grasp on his penis."

Mrs. Koothrappali

(as portrayed by Alice Amter)

Mother to Rajesh, fan of television series Doogie Howser, and sometimes meddling matchmaker to her son.
"Well, now she is a dental student at USC, so we gave her your contact information."

Mrs. Wolowitz

(as portrayed by Carol Ann Susi)

Mother and roommate to Howard Wolowitz. To date, she has never been seen, only heard.
"Book club was cancelled! That thing on Phyllis' neck opened up again!"

Stephanie Barnett

(as portrayed by Sara Rue)

Doctor and surgical resident at Fremont Memorial, also one-time romantic pursuit of Howard and briefly of romantic interest to Leonard.
"You had a little cheese dip. You farted. I thought it was cute."

Stuart

(as portrayed by Kevin Sussman)

Rhode Island School of Design graduate and owner/operator of a local comic book store. Partnered with guest star Wil Wheaton during a card game tournament he sponsored at the store. Very briefly pursued Penny as a romantic interest.
"Everyone has a different theory (regarding Sheldon)."