When delivery of another collectible leads to Penny's lashing out at Leonard, he decides it's time to give up his habit, much to his friends' protestation.

Directed by: Mark Cendrowski - Chuck Lorre - Bill Prady - Stephen Engel

Writer credits: Chuck Lorre - Bill Prady

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

AKA: The Big Bang Theory, TBBT, The Celebration Reverberation, Теорiя великого вибуху, Agymenők, המפץ הגדול עונה 4 פרק 20, Hamapats hagadol

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