In Missouri, Sam and Dean track down a shapeshifter that has killed five victims. In each case, it takes on the form of a victim's loved one, killed, and then left its duplicate to take the blame. But when the Winchesters become separated and then reunite, they soon realize that one of them is the creature they're hunting. Written by
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So how did you like shooting yourself?
I'll probably have nightmares about it.
Can't say I blame you.