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.

: 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

: Stephen Hawking makes his legendary first on-camera appearance, while astronaut Mike Massimino joins as a recurring guest during Howard’s space arc. : Amy Farrah Fowler (Mayim Bialik) and Bernadette

pack (2011–2012) captures a pivotal era of the series where it evolves from a quintet of misfits into a more balanced ensemble comedy. This 24-episode collection is defined by major relationship milestones, the expansion of the female cast, and high-profile scientific cameos. Season Overview & Major Arcs pack (2011–2012) captures a pivotal era of the

: Leonard Nimoy provides the voice for a Sheldon-sized Spock action figure, and Brent Spiner appears alongside series regular Wil Wheaton .

: 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.

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