Hypothesis - Episode 13: The Recombination

: The episode features a memorable scene where the guys play The Settlers of Catan , leading to various sexual innuendos involving Sheldon's request for "wood".

is the 13th episode of the fifth season of The Big Bang Theory and serves as the landmark 100th episode of the series. Episode Overview Episode 13: The Recombination Hypothesis

: Leonard sees Penny through a doorway and, on a whim, asks her to dinner. She accepts, leading to a romantic evening that starts well but quickly devolves into an argument about the "beta test" of their relationship. : The episode features a memorable scene where