Warner Bros. Television

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.

Worlds collide in Season 3! A love affair with Penny has opened a big, wide, wonderful world of romance for Leonard. But Sheldon likes the world just the way it was, thank you. All of which makes for a zany comic triangle with brainy, clueless Sheldon and practical, grounded Penny hilariously vying for the role of hypotenuse.

This saga follows two families - the Hazards, from the North, and the Mains, from the South - through their changing fortunes at home and the harsh realities of the battlefields. When the South surrenders at the end of the Civil War, the families are reunited once again in friendship. In the final installment, the two families continue through Post-Civil War Reconstruction into pioneer Indian territories.

Prepare to enter phase nine of television's perpetual laughter experiment as the show successfully fuses the elements of science and sitcom. Our two genius roommates, Leonard and Sheldon, and their friends are back once again (smarter, but no wiser). Last season, Sheldon went soul-searching (on a train, of course) and was prepared to make some substantial revisions on his Relationship Agreement with Amy, when everything changed.

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,...

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. This season, Leonard gets a girl. So does Sheldon. (Sheldon?!), Howard drives the Mars Rover into a ditch, Raj woos a terminator, gorgeous girl-next-door Penny falls under the spell of Age of Conan,...

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...

The prize: ending the Apocalypse. The price: Sam's life. Season 5's horrific finale left Dean alone as Sam descended into Hell. Now a different man, Dean vows to stop hunting and devote himself to building a family with Lisa and her son Ben. Then, mysteriously, Sam reappears, drawing Dean back into the old life. But Sam's a different man too. He's returned without his soul.

As the fastest man alive, Barry Allen, aka The Flash, faced metahuman threats from both this world and the parallel world of Earth-two. In Season Three, Barry faces the unknown, as he irrevocably alters the timeline by saving his mother from the clutches of the Reverse-Flash. The only question now, as he remains trapped in his own Flashpoint Paradox, is will he be able to find a way out?

For nine-year-old Sheldon Cooper, it isn't easy growing up in East Texas. Being a once-in-a-generation mind capable of advanced mathematics and science is not always helpful in a land where church and football are king. And while the vulnerable, gifted, and somewhat naive Sheldon deals with the world, his very normal family must find a way to deal with him.