The Big Bang Theory

Series 5 - 13. The Recombination Hypothesis

The Recombination Hypothesis

About this programme

13/24. Leonard asks Penny out on a date, and they agree to give their relationship another chance. They soon remember why it did not work out in the first place, but end up sleeping together anyway. The 100th episode of the comedy, starring Johnny Galecki and Kaley Cuoco-Sweeting.

Cast and crew


Leonard Hofstadter
Johnny Galecki
Kaley Cuoco-Sweeting
Sheldon Cooper
Jim Parsons
Howard Wolowitz
Simon Helberg
Raj Koothrappali
Kunal Nayyar
Melissa Rauch
Amy Farrah Fowler
Mayim Bialik

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