Leonard and Sheldon's fight spills over into everyone else's lives on The Big Bang Theory. "The Spoiler Alert Segmentation" is the 15th episode of the show's sixth season.
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The Big Bang Theory Season 6 Episode 15 Quotes

Leonard, wait! ... Dobby the elf dies in book 7.

Sheldon

I think your morning Cocoa Pops are turning you into a hysterical woman.

Sheldon