Robert Knepper to Guest Star on The Blacklist

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Robert Knepper has been Blacklisted by NBC.

The former Cult and Prison Break star - who will be a regular on TNT's Mob City - will guest star on Episode 5 of the new NBC drama, coming on board as the criminal at the center of an FBI investigation. TV Line first reported this piece of casting news.

Billy on Cult

The Blacklist is generating strong critical buzz and premieres on Monday. It features James Spader as Red Reddington, one of the world's Most Wanted, who ends up helping agent Elizabeth Keene (Megan Boone) track down those even more wanted than he is.

Watch a trailer now:

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