Stana Katic Teases Epic 100th 'Castle' Episode

Castle crosses a major TV mark tonight as ABC airs the 100th episode of their genre-blending hit series, and ETonline has a sneak peek of the Rear Window-inspired installment!

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In The Lives of Others, Castle is holed up in his loft with a broken leg while Beckett & Co. go off to investigate the death of an IRS agent. Cooped up and bored, Castle turns his attention to the building across the street, and believes he witnesses the murder of a young woman.

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The episode was doubly significant for the cast, as Stana Katic says, "It's a special episode tonight because [Castle creator] Andrew Marlowe and his wife [Terri Edda Miller] both wrote it. They wrote for the fans who are so sweet and supportive. I think it's going to be a nice glass of champagne for the fans."

Check out a sneak peek from the super-special episode, airing tonight at 10 p.m. on ABC.