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.

University physicists Leonard and Sheldon know whether to use an integral or a differential to solve the area under a curve. But they don't have a clue about girls. Or dating. Or clothes. Or parties. Or having fun. Or, basically, life. So when a pretty blonde named Penny moves in the apartment across the hall, the guys decide to get an education outside of the classroom. Boys, you have a lot to learn.

It's Season Three and the search for a soul mate has never been so wildly inappropriate! Thirty-year-old Ted is still looking for Miss Right, but his road to domestic bliss is improbably paved with punk rock girls, tattoos, adult video expos and an epic St. Patrick's Day bender. Meanwhile, as Marshall and Lily adjust to the quirks of married life, the outrageously incorrigible Barney commits a major violation of "The Bro Code." Plus, Season Three features a host of hilarious guest stars, including BRITNEY SPEARS, SARAH CHALKE (TV's Scrubs), ENRIQUE IGLESIAS, MANDY MOORE and supermodel HEIDI KLUM.

The woman of his dreams is out there — the question is, who is she? — Told in a series of flash backs, How I Met Your Mother is the hilariously unpredictable story of how twenty-something Ted meets his soul mate and says goodbye to the singles world of pick-up lines, one night stands, and relationship "deal-breakers." With friends Marshall and Lily's wedding fast approaching, the outrageously inappropriate Barney remains a consummate bachelor, while Ted's romance with Robin heats up, but is she really the one for him? Things have a funny way of working out in this delightfully fresh and fast-paced comedy.

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).

This season, Leonard gets a girl. So does 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. And super-smart, ueberconfident Leslie Winkler reduces mere men to spineless jellyfish.