Home Entertainment 13 of Our Favorite Sciencey Big Bang Theory Guest Stars

13 of Our Favorite Sciencey Big Bang Theory Guest Stars

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The comic book creator — who famously had cameos in many of his own movies — played himself

“The Excelsior Acquisition” — Instead of attending a signing by comic book legend Stan Lee (left), Sheldon (right) winds up in traffic court when he gets a ticket because of Penny (Kaley Cuoco, center), on THE BIG BANG THEORY, Monday, March 1 (9:31-10:00 PM, ET/PT) on the CBS Television Network. Photo: Cliff Lipson/CBS ©2010 CBS Broadcasting Inc. All Rights Reserved.

Gates made his cameo in season 11, spending the day at Penny’s company — much to the surprise of her pals. Leonard inserts himself, though, finding Gates at his hotel and introducing himself, ruining a surprise Penny planned for him in the process. And Sheldon thinks the entire meeting is a prank, given its April 1 timing (it’s not!).

“The Gates Excitation” -Pictured: Leonard Hofstadter (Johnny Galecki) and Bill Gates (Himself). Penny gets the opportunity to host Bill Gates at work when his company wants to partner with her pharmaceutical company. Also, Leonard, Koothrappali, and Wolowitz do everything in their power to meet him, while Sheldon thinks he is the victim of an April Fools’ prank, on THE BIG BANG THEORY, Thursday, March 29 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Photo: Erik Voake/CBS ©2018 CBS Broadcasting, Inc. All Rights Reserved.

The Science Guy himself came on to the show in season 7 (and again in season 12), when Sheldon brought him in to get revenge on Professor Proton (Bob Newhart). Another restraining order ensued.

“The Conjugal Configuration” – Pictured: Bill Nye (Himself). Sheldon and Amy’s honeymoon runs aground in New York, while Penny and Leonard discover they are uncomfortably similar to Amy’s parents, Mr. and Mrs. Fowler (Teller and Kathy Bates). Also, Koothrappali insults physicist Neil deGrasse Tyson and starts a Twitter war, on the 12th season premiere of THE BIG BANG THEORY, on a special night, Monday, Sept. 24 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Photo: Michael Yarish/Warner Bros. Entertainment Inc. © 2018 WBEI. All rights reserved.

So no, he’s not a scientist, but the beloved actor appeared on six episodes of the show playing the guys’ childhood icon, Professor Proton. The role earned him three Emmy nominations and one win.

“The Proton Transmogrification” — Professor Proton helps Sheldon cope with grief, on THE BIG BANG THEORY, Thursday, May 1 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Bob Newhart (pictured) returns as Professor Proton.
Photo: Darren Michaels/Warner Bros. Entertainment Inc.
© 2014 WBEI. All rights reserved

In season 6, the iconic astronaut appeared in the form of a video showing him handing out Milky Way and Mars bars on Halloween — and talking up his storied career to kids.

“The Holographic Excitation” — Astronaut Buzz Aldrin hands out Halloween candy to visitors in a cameo appearance as himself, on THE BIG BANG THEORY, Thursday, Oct. 25 (8:00 – 8:30 PM, ET/PT) on the CBS Television Network. Photo: Monty Brinton/CBS ©2012 CBS Broadcasting, Inc.. All Rights Reserved.

One of several Star Wars guests, Fisher appeared briefly in season 7, when Sheldon and his new friend James Earl Jones ding dong ditched her.

“The Convention Conundrum” — After the guys can’t get Comic-Con tickets, Sheldon tries to hold his own convention and winds up spending a wild night with James Earl Jones, on THE BIG BANG THEORY, Thursday, Jan. 30 (8:00 – 8:31 PM, ET/PT) on the CBS Television Network. James Earl Jones and Carrie Fisher (pictured) appear as themselves.
Photo: Robert Voets/CBS
©2014 CBS Broadcasting, Inc. All Rights Reserved

You read that right — new friends with Sheldon. The two bond over their love of Star Wars in the season 7 episode, and have dinner together before getting wrapped up in all sorts of antics.

“The Convention Conundrum” — After the guys can’t get Comic-Con tickets, Sheldon (Jim Parsons, left) tries to hold his own convention and winds up spending a wild night with James Earl Jones (right), on THE BIG BANG THEORY, Thursday, Jan. 30 (8:00 – 8:31 PM, ET/PT) on the CBS Television Network.
Photo: Robert Voets/CBS
©2014 CBS Broadcasting, Inc. All Rights Reserved

The Tesla founder was a guest in season 9, volunteering at a soup kitchen on Thanksgiving with Howard. He later had a cameo on an episode of the Big Bang spin-off, Young Sheldon.

“The Platonic Permutation” — Wolowitz (Simon Helberg, right) reluctantly agrees to volunteer at the soup kitchen with Bernadette, Raj and Emily, on THE BIG BANG THEORY, Thursday, Nov. 19 (8:00-8:31 PM, ET/PT), on the CBS Television Network. Also pictured left: Business Magnate and Inventor Elon Musk Guest Stars as Himself
Photo: Monty Brinton/CBS
©2015 CBS Broadcasting, Inc. All Rights Reserved

Luke Skywalker had a very important guest role on TBBT, serving as officiant for Sheldon and Amy’s season 11-ending wedding. He got roped into the task after Howard found his lost dog and he offered him a favor as thanks.

“The Bow Tie Asymmetry” – Pictured: Mark Hamill (Himself). When Amy’s parents and Sheldon’s family arrive for the wedding, everybody is focused on making sure all goes according to plan — everyone except the bride and groom, on the 11th season finale of THE BIG BANG THEORY, Thursday, May 10 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Photo: Michael Yarish/CBS ©2018 CBS Broadcasting, Inc. All Rights Reserved.

Onto Star Trek! Takei popped up in season 4, offering Howard some romantic advice during a fantasy sequence. (His costar Leonard Nimoy appeared in season 5, voicing his own action figure, and Nimoy’s son had a bit part in season 9).

“The Hot Troll Deviation” — Katee Sackhoff and George Takei guest star as themselves as Wolowitz’s love guides on THE BIG BANG THEORY, Thursday, Oct. 14 (8:00-8:31 PM, ET/PT) on the CBS Television Network. pictured left to right: George Takei, Katee Sackhoff, Simon Helberg and Melissa Rauch Photo: Cliff Lipson/CBS ©2010 CBS Broadcasting Inc. All Rights Reserved.

LeVar Burton
The actor’s guest spot stretched across three episodes in seasons 4, 6 and 8, first invited over for dinner via Twitter by Sheldon. His later spots involve appearances on “Sheldon Cooper Presents: Fun with Flags” — though in his final episode, he cuts ties with Sheldon for good.

“The Toast Derivation” — When the gang starts hanging out at Raj’s, Sheldon decides to get a new group of friends, including guest star LeVar Burton (pictured), on THE BIG BANG THEORY, Thursday, Feb. 24 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Photo: Monty Brinton/CBS ©2011 CBS Broadcasting Inc. All Rights Reserved

In season 4, Tyson, chummy with Raj, engaged in a war of words with Sheldon over the demotion of Pluto as a planet. He surfaced again briefly in a season 12 episode, too.

“The Conjugal Configuration” – Pictured: Neil deGrasse Tyson (Himself). Sheldon and Amy’s honeymoon runs aground in New York, while Penny and Leonard discover they are uncomfortably similar to Amy’s parents, Mr. and Mrs. Fowler (Teller and Kathy Bates). Also, Koothrappali insults physicist Neil deGrasse Tyson and starts a Twitter war, on the 12th season premiere of THE BIG BANG THEORY, on a special night, Monday, Sept. 24 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Photo: Michael Yarish/Warner Bros. Entertainment Inc. © 2018 WBEI. All rights reserved.

Between 2012 and 2017, physicist Hawking appeared in some form on seven episodes of the series, the first time in an episode devoted entirely to him in season 5. Following his death in 2018, the cast paid tribute to him in a special season 11 finale scene that was released online.

“The Hawking Excitation” — When Wolowitz gets to work with Stephen Hawking (left), Sheldon (Jim Parsons, right) is willing to do anything to meet his hero, on THE BIG BANG THEORY, Thursday, April 5 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Photo: Sonja Flemming/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.