Dakin Matthews and Jim Parsons in The Big Bang Theory (2007)

Robert Noble and Jim Parsons in The Big Bang Theory (2007)

Jim Parsons and Anil Margsahayam in The Big Bang Theory (2007)

Tonja Kahlens in The Big Bang Theory (2007)

Wil Wheaton and Kaley Cuoco in The Big Bang Theory (2007)

Kaley Cuoco and Rod Keller in The Big Bang Theory (2007)

Fernando Rivera in The Big Bang Theory (2007)

Kaley Cuoco and Barak Hardley in The Big Bang Theory (2007)

Mayim Bialik, Alex Ball, and Melissa Rauch in The Big Bang Theory (2007)

Kaley Cuoco in The Big Bang Theory (2007)

Johnny Galecki, Bob Newhart, Troy Winbush, and Jim Parsons in The Big Bang Theory (2007)

Kaley Cuoco, Johnny Galecki, Bob Newhart, Troy Winbush, and Jim Parsons in The Big Bang Theory (2007)

Dakin Matthews in The Big Bang Theory (2007)

William Stanford Davis and Jim Parsons in The Big Bang Theory (2007)

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

Kevin Sussman, Janelle Marra, and Kunal Nayyar in The Big Bang Theory (2007)

Johnny Galecki and Karl T. Wright in The Big Bang Theory (2007)

Simon Helberg, Jim Parsons, and Nick Clifford 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)

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

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

Sean Astin, Mayim Bialik, Kal Penn, and Jim Parsons in The Big Bang Theory (2007)

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

Mayim Bialik in The Big Bang Theory (2007)

Simon Helberg and Kurt Scholler in The Big Bang Theory (2007)

Jim Parsons in The Big Bang Theory (2007)

Kathy Bates and Jim Parsons in The Big Bang Theory (2007)

Johnny Galecki in The Big Bang Theory (2007)

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

Kaley Cuoco and Johnny Galecki in The Big Bang Theory (2007)

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

Simon Helberg in The Big Bang Theory (2007)

Kunal Nayyar in The Big Bang Theory (2007)

Melissa Rauch in The Big Bang Theory (2007)