Kunal Nayyar, Kate Micucci Photo
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Photo Flash: First Look - THE BIG BANG THEORY's Season Finale, Airing 5/16
On THE BIG BANG THEORY's upcoming sixth season finale, titled 'The Bon Voyage Reaction,' a new success for Leonard makes Sheldon very jealous and throws Penny for a loop. Meanwhile, Koothrappali pushes Lucy too far in their relationship, on Thursday, May 16 (8:00 - 8:31 PM, ET/PT) on CBS.