Who plays Dexter season 7 mob boss Isaak Sirko?

Ray Stevenson plays Dexter season 7 mob boss Isaak Sirko.

Sirko is a high-ranking member of the Koshka Brotherhood, a Ukrainian criminal organization operating in Miami. He comes to Florida after the disappearance and death of Viktor Baskov, one of his associates and lovers, and traces the killing back toward Dexter Morgan.

Sirko begins as a major antagonist, pursuing Dexter for revenge. Their relationship becomes more complicated when both recognize that they are shaped by secrecy, violence, and love. Dexter eventually helps him deal with threats from within the Brotherhood, but Sirko is mortally wounded by George Novikov.

A common mix-up is Jason Gedrick, who appears in the same season as George Novikov, a manager connected to a Miami gentlemen’s club. Peter Weller also appears in Dexter, but not as Sirko. Stevenson’s role was a nine-episode guest arc and was one of season 7’s central storylines.