Previously on The Big Bang Theory
Season 1: Episode 16: The Peanut Reaction
The gang finds out that Leonard's birthday is coming up. Penny wants to throw him a party, but she finds out that his family never celebrated his birthdays. Penny decides to throw him a surprise party ... More...
Watch Videos from The Big Bang Theory
Full Episodes
The Big Bang Theory - The Peanut Reaction
19:55
When Penny learns that Leonard doesn't celebrate birthdays, she attempts to thr...
The Big Bang Theory - The Porkchop Indeterminacy
21:59
When Leonard, Wolowitz, and Koothrappali all become smitten with Sheldon's twin...
The Big Bang Theory - The Nerdvana Annihilation
20:12
When Leonard and the guys buy a time machine prop from a classic 1960 movie, it...
Clips
The Big Bang Theory - Penny Blackmails Sheldon
2:16
The Big Bang Theory - Leonard Is A Birthday Virgin
3:00
Take A Bite Out Of CBS Comedy
1:00
The Big Bang Theory - The Inconvenient Time Machine
1:13
The Big Bang Theory - I'll Kill My Rabbi With A Pork Chop
1:46
The Big Bang Theory - My People Invented Circumcision
1:41
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How I Met Your Mother - Everything Must Go
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Next on Big Bang Theory
May 19, 8:00pm et/pt
Tangerine Factor
Penny, Leonard, and Sheldon run through another wild adventure. TV14-DL
