Jim Parsons in The Big Bang Theory (2007)

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

Mark Hamill, Mayim Bialik, Kaley Cuoco, and Jim Parsons in The Big Bang Theory (2007)

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

Simon Helberg and Melissa Rauch in The Big Bang Theory (2007)

George Takei, Simon Helberg, Katee Sackhoff, and Melissa Rauch in The Big Bang Theory (2007)

Simon Helberg and Katee Sackhoff in The Big Bang Theory (2007)

Bob Newhart in The Big Bang Theory (2007)

Christine Baranski in The Big Bang Theory (2007)

Mayim Bialik, Kaley Cuoco, Johnny Galecki, Simon Helberg, Jim Parsons, Melissa Rauch, and Kunal Nayyar in The Big Bang Theory (2007)

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

Melissa Rauch in The Big Bang Theory (2007)