Wil Wheaton in The Big Bang Theory (2007)

Mayim Bialik and Jim Parsons in The Big Bang Theory (2007)

Kaley Cuoco, Jim Parsons, and Melissa Rauch in The Big Bang Theory (2007)

Johnny Galecki, Simon Helberg, and Kunal Nayyar in The Big Bang Theory (2007)

Wil Wheaton, Johnny Galecki, Simon Helberg, and Kunal Nayyar in The Big Bang Theory (2007)

Bob Newhart and Jim Parsons in The Opening Night Excitation (2015)

Mayim Bialik and Jim Parsons in The Opening Night Excitation (2015)

Jim Parsons in The Opening Night Excitation (2015)

Melissa Rauch in The Big Bang Theory (2007)

Kaley Cuoco and Melissa Rauch in The Big Bang Theory (2007)

Mayim Bialik in The Big Bang Theory (2007)

Mayim Bialik, Kaley Cuoco, and Melissa Rauch in The Big Bang Theory (2007)

Johnny Galecki and Jim Parsons in The Big Bang Theory (2007)

Johnny Galecki, Simon Helberg, Jim Parsons, and Kunal Nayyar in The Big Bang Theory (2007)

Kunal Nayyar in The Big Bang Theory (2007)