A.J. Buckley is set to mess with Raylan Givens.

The long-time CSI: NY star will play a critical role on Justified Season 5, FX sources confirm, recurring on the terrific drama as a member of the Crowes.

Look for Buckley to come on board as Danny, a romantic and a sociopath and a member of the family that will cause major problems for Raylan and other law enforcement officers this winter.

Buckley joins Michael Rapaport and Alicia Witt as members of the villainous Crowes.

Justified Season 5 is expected to premiere in January.
 

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