The Big Bang Theory

Season 5 Episode 13

The Recombination Hypothesis

22
Aired Thursday 8:00 PM Jan 19, 2012 on CBS
AIRED:
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Episode Summary

Leonard asks Penny out on an impromptu romantic date.

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Johnny Galecki

Johnny Galecki

Leonard Hofstadter

Jim Parsons

Jim Parsons

Sheldon Cooper

Kaley Cuoco

Kaley Cuoco

Penny

Simon Helberg

Simon Helberg

Howard Wolowitz

Kunal Nayyar

Kunal Nayyar

Rajesh Koothrappali

Melissa Rauch

Melissa Rauch

Bernadette Rostenkowski

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