| Picture
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Name
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Role in The Big Bang Theory
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Role on The Simpsons
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Kareem Abdul-Jabbar
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Played himself in "The D&D Vortex".
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Voiced himself in the season 22 episode "Love Is a Many-Strangled Thing".
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Buzz Aldrin
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Played himself in "The Holographic Excitation".
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Voiced himself in "Deep Space Homer".
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Christine Baranski
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Played Dr. Beverly Hofstadter in 16 episodes.
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Voiced herself in "Portrait of a Lackey on Fire".
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Ed Begley, Jr.
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Played Dr. Linkletter on Young Sheldon.
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Guest-voiced himself in the Season 10 episode "Homer to the Max" and the Season 20 episode "Gone Maggie Gone".
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Ellen DeGeneres
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Played herself in "The Geology Elevation" and "The Laureate Accumulation".
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Voiced herself in the season 21 episode "Judge Me Tender".
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Neil Gaiman
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Played himself in "The Comet Polarization".
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Voiced himself in the season 23 episode "The Book Job" and Snowball II in the season 29 episode "Treehouse of Horror XXVIII".
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Sarah Michelle Gellar
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Played herself in "The Stockholm Syndrome".
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Voiced Gina Vendetti in "The Wandering Juvie" and "Moonshine River".
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Sara Gilbert
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Played Leslie Winkle in several episodes.
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Voiced Laura Powers in "New Kid on the Block".
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Mark Hamill
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Played himself in "The Bow Tie Asymmetry".
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Voiced himself and Leavelle in "Mayored to the Mob".
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Stephen Hawking
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Played himself in several episodes.
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Voiced himself in the Season 10 episode "They Saved Lisa's Brain", the season 16 episode "Don't Fear the Roofer", the season 18 episode "Stop, or My Dog Will Shoot!", and the season 22 episode "Elementary School Musical".
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James Earl Jones
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Played himself in "The Convention Conundrum".
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Voiced the removalist, The Raven Narrator, Serak the Preparer in "Treehouse of Horror", Maggie in "Treehouse of Horror V" and the narrator of "Das Bus".
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Stan Lee
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Played himself in "The Excelsior Acquisition".
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Voiced himself in the season 13 episode "I Am Furious (Yellow)", the season 25 episode "Married to the Blob" and the couch gag for the season 28 episode "The Caper Chase".
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Christopher Lloyd
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Played Theodore in "The Property Division Collision".
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Voiced Doc Brown in The Simpsons Ride; reprised the role of his Taxi character Jim Ignatowski in the Season 26 episode "My Fare Lady".
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Stephen Merchant
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Played Dave Gibbs in three episodes.
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Voiced CONRAD in the season 27 episode "The Girl Code".
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Elon Musk
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Played himself in "The Platonic Permutation".
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Voiced himself in "The Musk Who Fell to Earth".
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Bob Newhart
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Played recurring character Professor Proton in both The Big Bang Theory and Young Sheldon.
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Voiced himself in the season 7 episode "Bart the Fink".
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Leonard Nimoy
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Voiced a Spock action figure in "The Transporter Malfunction".
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Voiced himself in "Marge vs. the Monorail" and "The Springfield Files".
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Brian Posehn
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Played recurring character Bert Kibbler the geologist.
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Voiced Dumlee in the Season 28 episode "A Father's Watch"; also co-wrote the comic story Gnaws.
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Michael Rapaport
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Played Kenny Fitzgerald in "The Helium Insufficiency".
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Voiced Mike Wegman in "Go Big or Go Homer" and "Bart the Cool Kid".
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Kevin Smith
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Played himself in "The Fortification Implementation" and "The D&D Vortex".
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Voiced himself in "Highway to Well".
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Yeardley Smith
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Guest-starred as an employment agency counselor in "The Einstein Approximation".
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Voices Lisa Simpson.
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Brent Spiner
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Played himself in "The Russian Rocket Reaction".
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Voiced the A9000 Robots in "Them, Robot".
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George Takei
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Played himself in "The Hot Troll Deviation".
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Voiced Akira Kurosawa in the season 2 episode "One Fish, Two Fish, Blowfish, Blue Fish", a waiter in the season 13 episode "A Hunka Hunka Burns in Love", Wink in the season 10 episode "Thirty Minutes Over Tokyo", a sushi chef in the season 24 episode "What Animated Women Want", and himself in the season 27 episode "The Burns Cage".
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Teller
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Played Mr. Fowler in three episodes.
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Voiced himself in "Hello Gutter, Hello Fadder" and "The Great Simpsina".
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Neil deGrasse Tyson
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Played himself in "The Apology Insufficiency" and "The Conjugal Configuration".
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Voiced himself in "The Caper Chase".
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Adam West
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Played himself in "The Celebration Experimentation".
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Voiced himself in "Mr. Plow", Batman in "Large Marge" and reprised Mayor Adam West in "The Simpsons Guy".
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