The Big Bang Theory Episodes :- The Terminator Decoupling

In Season 2 Episode17 During a train trip to San Francisco, guys learn that Summer Glau, their favorite sci-fi actress is on board. The guys are thrilled about getting a chance to meet their most loved actress in person but have heated debate amongst them as to who will approach the actress. While Howard tries to think up an impressive opening line to start the conversation, Rajesh starts talking with the actress after having a non-alcoholic beer. However, when Rajesh learns about the beer being non-alcoholic, he stops talking and Howard takes up his place only to creep out Summer. Leonard gets his opportunity to interact with Summer just before she gets off the train. Later, Sheldon asks Penny to find his flash-drive using which she can send him an important paper through e-mail, that Sheldon needs to show to Professor George Smoot in San Francisco. However, it turns out that the Professor is not impressed with Sheldon.