The Blacklist: Key Players

Though initially wary of Reddington's surrender, Cooper eventually realizes that Red's incredible value as an informant is worth the risk of…

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| 2013 NBCUniversal Media, LLC

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Donald Ressler is a veteran FBI field agent who's been assigned to track Raymond Reddington for the bulk of his career.

David Giesbrecht/NBC
| 2013 NBCUniversal Media, LLC.

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