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The mysterious symbol on Doe's chest is part of the calling card left by a serial killer known as The Mourner who knows a lot about Doe, whom he challenges with cryptic clues as he puts more lives in danger.
First Air Date : Sep 20, 2002
Last Air date : Apr 25, 2003
Episode : 21 Episode
Season : 1 Season
Runtime: 60:44 minutes
Studio: FOX
Country: United States of America