The Big Bang Theory

Season 4 Episode 6

The Irish Pub Formulation

17
Aired Monday 8:00 PM Oct 28, 2010 on CBS
AIRED:
7.6
out of 10
User Rating
367 votes

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Episode Summary

When Raj's sister has a one-day layover he forbids the others from hooking up with her, unaware she and Leonard already did long ago.

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