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

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

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

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

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

Mayim Bialik in The Big Bang Theory (2007)

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

Jim Parsons in The Big Bang Theory (2007)

Simon Helberg in The Big Bang Theory (2007)

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

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

Maria Canals-Barrera in The Big Bang Theory (2007)