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

Jim Parsons in The Big Bang Theory (2007)

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)

Mayim Bialik in The Big Bang Theory (2007)

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

Simon Helberg in The Big Bang Theory (2007)

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

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

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

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

Mayim Bialik, Simon Helberg, Melissa Rauch, and Kunal Nayyar in The Big Bang Theory (2007)

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

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

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

Kaley Cuoco in The Big Bang Theory (2007)

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

Johnny Galecki in The Big Bang Theory (2007)

Kevin Sussman and Lauren Lapkus in The Big Bang Theory (2007)

Kunal Nayyar and Rati Gupta in The Big Bang Theory (2007)

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