The Big Bang Theory

2007•3 series•Entertainment / Comedy

Available on TLC HD

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?

Episode 17The Precious Fragmentation

The guys go to a garage sale and find a ring from the Lord of the Rings films, and the rare find threatens their friendship. S3, Ep17

Episode 18The Pants Alternative

Sheldon's fear of speaking in front of large groups threatens his ability to accept an award, so the gang tries to help him prepare for the big night. S3, Ep18

Episode 19The Wheaton Recurrence

Sheldon squares off at the bowling alley against nemesis Wil Wheaton. Leonard's miffed over Penny's response when he says, 'I love you.' S3, Ep19

Episode 20The Spaghetti Catalyst

The Spaghetti Catalysis. Following Leonard and Penny's break up, Sheldon tries to hide from Leonard and the gang that he had a friendly spaghetti dinner at Penny's. S3, Ep20

Episode 21The Plimpton Stimulation

Sheldon hosts a visiting female physicist, but her intelligence seems matched by her libido. S3, Ep21

Episode 22The Staircase Implementation

A squabble over the thermostat setting leads to Leonard going over to Penny's and recounting the story of how he met and moved in with Sheldon. S3, Ep22

Episode 23The Lunar Excitation

Howard and Raj set Sheldon up on an Internet dating site. Penny discovers that she can't go back to dating dumb jocks after dating Leonard. S3, Ep23

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