: 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
Available on both Blu-ray and DVD , the season set includes several exclusive extras: : Amy Farrah Fowler (Mayim Bialik) and Bernadette
: While his friends find partners, Raj continues to struggle with his selective mutism, even attempting to find companionship through a mobile phone's virtual assistant. Cast & Guest Appearances Cast & Guest Appearances : Leonard Nimoy provides
: Leonard Nimoy provides the voice for a Sheldon-sized Spock action figure, and Brent Spiner appears alongside series regular Wil Wheaton .
: Laurie Metcalf returns as Mary Cooper, and Christine Baranski reprises her role as Leonard’s mother, Beverly. "Complete Pack" Features
The season is notable for bringing together icons of science and science fiction: