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Sheldon and Leonard look for a way to derail a 15-year-old physics prodigy's research.

Sheldon and Leonard look for a way to derail a 15-year-old physics prodigy's research.

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The Big Bang Theory

S5, EP9 "The Ornithophobia Diffusion"

Leonard and Penny spend time alone; Sheldon tries to face his fear of birds.

The Big Bang Theory

S1, EP14 "The Nerdvana Annihilation"

Leonard and the guys buy a time machine prop from a classic movie; Penny tells the guys their obsession with comics and toys is pathetic.

The Big Bang Theory

S2, EP14 "The Financial Permeability"

Sheldon's solution to Penny's financial difficulty leads to a confrontation between Leonard and Penny's ex-boyfriend.

The Big Bang Theory

S2, EP15 "The Maternal Capacitance"

Leonard and Penny are drawn together after a disastrous visit from Leonard's mother (Christine Baranski).

The Big Bang Theory

S4, EP18 "The Prestidigitation Approximation"

Leonard has to choose between Penny and his new girlfriend, Priya; Howard's magic trick drives Sheldon crazy.

The Big Bang Theory

S4, EP17 "The Toast Derivation"

Sheldon is upset when he realizes Leonard is the center of their group of friends.

The Big Bang Theory

S4, EP16 "The Cohabitation Formulation"

Wolowitz considers taking things with Bernadette to the next level; Leonard and Raj's sister rekindle their relationship.

The Big Bang Theory

S4, EP15 "The Benefactor Factor"

A wealthy donor makes Leonard question what he is willing to do for science.

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, Alice Amter, Brian George, Jim Parsons, John Ross Bowie, Johnny Galecki, Joshua Malina, Kaley Cuoco, Kevin Sussman, Kunal Nayyar, Mayim Bialik, Melissa Rauch, Sara Gilbert, Simon Helberg, Wil Wheaton
Original Air Date: Sep 24, 2007
Genres: ComedyTV Series
Rating: TVPG
Playback: HD
3 seasons available on demand
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The Big Bang Theory

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?

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