Tom Quinn, born April 28, 1934 in Queens, New York, USA, is an actor. He guest stars as Detective Patrick Mahon in the first season. He has appeared in The Wire creator David Simon's other series Homicide: Life on the Street. Quinn has also appeared in the series The West Wing and the films ...And Justice for All. (1979), Enemy of the State (1998), The Next Three Days (2010), and Super 8 (2011).