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Leonard must choose who to bring with him when he goes to see the Large Hadron Collider on Valentine's Day.

Starring: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
More
Original Air Date: Feb 8, 2010

Leonard must choose who to bring with him when he goes to see the Large Hadron Collider on Valentine's Day.

Starring: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg
More
Original Air Date: Feb 8, 2010

How to watch

More episodes

Nickelodeon • Today, 3:00am • 30m

The Big Bang Theory

S2, EP18 "The Work Song Nanocluster"

Penny's home business turns into a complete nightmare when Sheldon takes over.

Nickelodeon • Today, 3:30am • 30m

The Big Bang Theory

S2, EP19 "The Dead Hooker Juxtaposition"

Penny develops a rivalry with a sexy new female neighbor who threatens her position as queen bee of the building.

Nickelodeon • Today, 4:00am • 35m

The Big Bang Theory

S2, EP20 "The Hofstadter Isotope"

Wolowitz and Leonard decide to check out a local bar on Ladies' Night.

Nickelodeon • Today, 4:35am • 35m

The Big Bang Theory

S2, EP21 "The Vegas Renormalization"

Koothrappali and Leonard take Wolowitz to Las Vegas; Sheldon is forced to bunk with Penny when he gets locked out of his apartment.

Mensa-fied best friends and roommates Leonard and Sheldon, physicists who work at the California Institute of Technology, may be able to tell everybody more than they want to know about quantum physics, but getting through most basic social situations, especially ones involving women, totally baffles them. How lucky, then, that babe-alicious waitress/aspiring actress Penny moves in next door. Frequently seen hanging out with Leonard and Sheldon are friends and fellow Caltech scientists Wolowitz and Koothrappali. Will worlds collide? Does Einstein theorize in the woods?
Starring: Aarti Mann, Brian George, Jim Parsons, John Ross Bowie, Johnny Galecki, Kaley Cuoco, Kaley Cuoco-Sweeting, Kevin Sussman, Kunal Nayyar, Laura Spencer, Mayim Bialik, Melissa Rauch, Sara Gilbert, Simon Helberg, Wil Wheaton
Original Air Date: Sep 24, 2007
Genres: ComedyTV Series
Rating: TVPG
Playback: HD
4 seasons available on demand
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