Regarding the opposite sex, they're on a steep learning curve. In every other sense, they're geniuses. Join physicists Leonard Hofstadter (Johnny Galecki) and Sheldon Cooper (Jim Parsons) as they ponder black holes, chemical deviations, girls, and other mysteries of the universe.

The story of American scientist J. Robert Oppenheimer and his role in the development of the atomic bomb.

This season the Big Bang gang's romantic universe expands. On the rebound from Penny, Leonard falls into the arms of Raj's sister Priya. Sheldon gets a girlfriend, or rather a friend who is a girl: Amy, a dour neurobiologist who declares herself besties with Penny. Howard and Bernadette heat up. And so do Raj and Bernadette (at least in Raj's Bollywood daydream). All in the furtherance of award-winning genius comedy.

Socially challenged they remain, but the scientific geniuses of 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 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 life, even when...

Physicists Leonard and Sheldon understand everything from the inescapable gravitational pull of a black hole to the intricate structure of the atom. But take those atoms and assemble them into a woman, and their comprehension comes to a grinding halt. And when Penny, a woman with all those atoms in all the right places, moves in across the hall, Leonard and Sheldon's universe begins to expand in ways they never could have imagined.

He's baaack! Sheldon is retrieved from his soul-searching cross-country train trip (older but no wiser) and that means the gang's all here to spread another year's cheer as TV's most attended laugh seminar. Enroll in this comic curriculum to explore Leonard's minor surgery becoming a major catastrophe from his roommate, Howard's obsession over his mom's relationship with retailer-turned-caretaker Stuart, and the peculiar results of Penny's technique...