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Appearances
Young Sheldon
Guest cast, played by Wallace Shawn
- Episode 1x19: Gluons, Guacamole, and the Color Purple (Apr 19, 2018)
- Episode 1x21: Summer Sausage, a Pocket Poncho, and Tony Danza (May 3, 2018)
- Episode 1x22: Vanilla Ice Cream, Gentleman Callers, and a Dinette Set (May 10, 2018)
- Episode 2x02: A Rival Prodigy and Sir Isaac Neutron (Sep 27, 2018)
- Episode 2x05: A Research Study and Czechoslovakian Wedding Pastries (Oct 18, 2018)
- Episode 2x07: Carbon Dating and a Stuffed Raccoon (Nov 1, 2018)
- Episode 2x09: Family Dynamics and a Red Fiero (Nov 15, 2018)
- Episode 2x10: A Stunted Childhood and a Can of Fancy Mixed Nuts (Dec 6, 2018)
- Episode 2x13: A Nuclear Reactor and a Boy Called Lovey (Jan 17, 2019)
- Episode 2x15: A Math Emergency and Perky Palms (Feb 7, 2019)
- Episode 2x18: A Perfect Score and a Bunsen Burner Marshmallow (Apr 4, 2019)
- Episode 2x19: A Political Campaign and a Candy Land Cheater (Apr 25, 2019)
- Episode 2x20: A Proposal and a Popsicle Stick Cross (May 2, 2019)
- Episode 2x21: A Broken Heart and a Crock Monster (May 9, 2019)
- Episode 2x22: A Swedish Science Thing and the Equation for Toast (May 16, 2019)
- Episode 3x05: A Pineapple and the Bosom of Male Friendship (Oct 24, 2019)
- Episode 3x06: A Parasol and a Hell of an Arm (Nov 7, 2019)
- Episode 3x07: Pongo Pygmaeus and a Culture that Encourages Spitting (Nov 14, 2019)
- Episode 3x08: The Sin of Greed and a Chimichanga from Chi-chi's (Nov 21, 2019)
- Episode 3x09: A Party Invitation, Football Grapes and an Earth Chicken (Dec 5, 2019)
- Episode 3x10: Teenager Soup and a Little Ball of Fib (Dec 12, 2019)
- Episode 3x12: Body Glitter and a Mall Safety Kit (Jan 16, 2020)
- Episode 3x13: Contracts, Rules and a Little Bit of Pig Brains (Jan 30, 2020)
- Episode 3x15: A Boyfriend's Ex-Wife and a Good Luck Head Rub (Feb 13, 2020)
- Episode 3x16: Pasadena (Feb 20, 2020)
- Episode 3x17: An Academic Crime and a More Romantic Taco Bell (Mar 5, 2020)
- Episode 3x20: A Baby Tooth and the Egyptian God of Knowledge (Apr 16, 2020)
- Episode 3x21: A Secret Letter and a Lowly Disc of Processed Meat (Apr 30, 2020)
- Episode 4x06: Freshman Orientation and the Inventor of the Zipper (Jan 21, 2021)
- Episode 4x08: An Existential Crisis and a Bear That Makes Bubbles (Feb 18, 2021)
- Episode 4x12: A Box of Treasure and the Meemaw of Science (Apr 1, 2021)
- Episode 4x13: The Geezer Bus and a New Model for Education (Apr 8, 2021)
- Episode 4x16: A Second Prodigy and the Hottest Tips for Pouty Lips (Apr 29, 2021)
- Episode 4x17: A Black Hole (May 6, 2021)
- Episode 5x01: One Bad Night and Chaos of Selfish Desires (Oct 7, 2021)
- Episode 5x03: Potential Energy and Hooch on a Park Bench (Oct 21, 2021)
- Episode 5x05: Stuffed Animals and A Sweet Southern Syzygy (Nov 4, 2021)
- Episode 5x06: Money Laundering and a Cascade of Hormones (Nov 11, 2021)
- Episode 5x10: An Expensive Glitch and a Goof-Off Room (Jan 6, 2022)
- Episode 5x14: A Free Scratcher and Feminine Wiles (Feb 24, 2022)
- Episode 5x15: A Lobster, an Armadillo and a Way Bigger Number (Mar 3, 2022)
- Episode 5x18: Babies, Lies and a Resplendent Cannoli (Apr 14, 2022)
- Episode 6x03: Passion's Harvest and a Sheldocracy (Oct 13, 2022)
- Episode 6x04: Blonde Ambition and the Concept of Zero (Oct 20, 2022)
- Episode 6x09: College Dropouts and the Medford Miracle (Jan 5, 2023)
- Episode 6x11: Ruthless, Toothless and a Week of Bed Rest (Feb 2, 2023)
- Episode 6x15: Teen Angst and a Smart-Boy Walk of Shame (Mar 9, 2023)
- Episode 6x18: Little Green Men and a Fella's Marriage Proposal (Apr 27, 2023)
- Episode 6x19: A New Weather Girl and a Stay-at-Home Coddler (May 4, 2023)
- Episode 6x20: German for Beginners and a Crazy Old Man with a Bat (May 11, 2023)
- Episode 7x09: A Fancy Article and a Scholarship for a Baby (Apr 25, 2024)