[SPOILER ALERT: This article contains key plot details from Sunday's Season 4 finale.]
Dexter may have killed Arthur Mitchell, aka the Trinity Killer (John Lithgow), in the Season 4 finale of Dexter, but not before Trinity murdered Dexter's wife Rita (Julie Benz). We sat down with Lithgow at the Dexter finale party Sunday to hear his thoughts on the game-changing developments. Lithgow also discussed how the serial killer was almost spared from Dex's table and if he'll be returning to the show post-mortem.
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