The Big Bang Theory Season 5 Complete Pack -

Available on both Blu-ray and DVD , the season set includes several exclusive extras:

: The milestone episode, "The Recombination Hypothesis," sees Leonard and Penny attempt a "beta test" of their relationship after their initial breakup, marking a central narrative shift for the series. The Big Bang Theory Season 5 Complete Pack

The season is notable for bringing together icons of science and science fiction: Available on both Blu-ray and DVD , the

: Laurie Metcalf returns as Mary Cooper, and Christine Baranski reprises her role as Leonard’s mother, Beverly. "Complete Pack" Features : Sheldon and Amy formalize their unique bond

: Stephen Hawking makes his legendary first on-camera appearance, while astronaut Mike Massimino joins as a recurring guest during Howard’s space arc.

: 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.