John Prosky is an American film, theatre, and television actor. His numerous TV credits include NYPD Blue, ER, Heroes, Criminal Minds, True Blood, JAG, My So-Called Life, Star Trek: Deep Space Nine, The Practice, The X-Files, The West Wing, Charmed, 24, House, Greys Anatomy, Veronica Mars, Fringe, and the web series Red Bird. His film credits include The Nutty Professor, Bowfinger, and A.I. Artificial Intelligence. He also contributed voice work to the L.A. Noire video game. He is the son of actor Robert Prosky. He is of Slavic descent.
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