Socially challenged they remain, but the scientific geniuses of the show always deliver hilarious results. Leonard returns from his North Sea expedition to find that his relationship with Penny involves more beta-testing than he's ever done in a lab. Howard's attachment issues with the women in his life in particular and Raj's social breakthrough with women in general provide more laughs. Bernadette and Amy stand staunchly by the men in their lives, even when they're sitting in a marathon role-playing game.

Language options taken from DVD menu and may differ from container packaging. Originally broadcast on television by CBS during the 2013-2014 television season. Special features: 2013 Comic-Con panel; Johnny Galecki crashes the BBT writers panel; String theory serenade; James Earl Jones: the un-conventional guest star; The Big Bang Theory's May the 4th; The big Cendrowski: backstage with the coolest director and cast in the Universe; BBTea time; gag reel.