Guest Star: Elon Musk
The Platonic Permutation
Season 9, Episode 9 - Aired November 19, 2015Sheldon and Amy try hanging out as friends when they spend Thanksgiving together at the aquarium. Also, Wolowitz reluctantly agrees to volunteer at the soup kitchen with Bernadette, Raj and Emily, and Penny discovers that Leonard knows more about her than she thought.
Appeared as Himself
Other Shows
Elon Musk guest starred in 1 episode of Young Sheldon.
106. A Patch, a Modem, and a Zantac as Himself
Aired November 30, 2017
In April 2016, Elon Musk is about to be interviewed on CNN after his company, SpaceX, successfully landed a rocket. Elon is reading Sheldon's research journal from 1989 and hides it away before the interviewer arrives.