Season six kicks off in space, where Howard is caught in an argument between Bernadette and his mom. Back on Earth, Sheldon decides to hire, Alex, a young female assistant which makes Amy feel threatened. Meanwhile, Leonard and Penny make strides to define their relationship and Raj attempts to find love. Find out what surprises are in store for everyone, once Howard returns home in these twenty four must watch episodes.

Title from container. Special features: The big bang theory: The final comedy frontier ; Houston, We have a sit-com; The big bang theory at Paleyfest 2013; Electromagnetism: The best relationship moments in season 6; gag reel.

Disc 1.The date night variable ; The decoupling fluctuation ; The Higgs Boson observation ; The re-entry minimization ; The holographic excitation ; The extract obliteration ; The habitation configuration ; The 43 peculiarity -- disc 2. The parking spot escalation ; The fish guts displacement ; The Santa simulation ; The egg salad equivalency ; The Bakersfield expedition ; The Cooper/Kripke inversion ; The spoiler alert segmentation ; The tangle affection proof -- disc 3. The monster isolation ; The contractual obligation implementation ; The closet reconFiguration ; The tenure turbulence ; The closure alternative ; The proton resurgence ; The love spell potential ; The bon voyage reaction.