Leonard, Sheldon and Wolowitz are ecstatic to learn that a famous science-fiction actress (Summer Glau) is on board the train they are taking to San Francisco.

Directed by: Chuck Lorre - Mark Cendrowski - Bill Prady - Tim Doyle

Writer credits: Chuck Lorre - Bill Prady

Cast: Johnny Galecki - Jim Parsons - Kaley Cuoco - Simon Helberg - Kunal Nayyar

AKA: The Big Bang Theory, The Celebration Reverberation, Теорiя великого вибуху, Agymenők, TBBT, Teorie velkého třesku

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