The Big Bang Theory Season 5 Complete Pack -

: Amy Farrah Fowler (Mayim Bialik) and Bernadette Rostenkowski (Melissa Rauch) are promoted to main characters, providing a female social circle for Penny that mirrors the guys' group.

: Sheldon and Amy formalize their unique bond with a "Relationship Agreement," while Howard and Bernadette prepare for their wedding, culminating in Howard's mission to the International Space Station. The Big Bang Theory Season 5 Complete Pack

The season is notable for bringing together icons of science and science fiction: : Amy Farrah Fowler (Mayim Bialik) and Bernadette