Bob Newhart as Arthur Jeffries
Bob Newhart played Arthur Jeffries, also known as Professor Proton—the star of a science show that Sheldon and Leonard watched as children. The character was an homage to Mr. Wizard. In real life, Newhart is a famous comedian. He received a Primetime Emmy Award for the role.
Kunal Nayyar as Rajesh Koothrappali
Raj was the final component of The Big Bang Theory geek squad. An astrophysicist from New Delhi, Raj suffered from such terrible anxiety around women that he became unable to speak. Kunal Nayyar was the third-highest-paid TV actor in the world in 2015 and 2018, respectively.