
Tergesen was born in Ivoryton, Connecticut and graduated from Valley Regional High School in nearby Deep River. He moved to New York to try to become an actor. He graduated from the American Musical and Dramatic Academy (AMDA)'s two-year program in Manhattan, where, from 1986 to 1989, he worked at the Empire Diner.

Law & Order
TV • 1990

Law & Order
TV • 1990

Law & Order: Special Victims Unit
TV • 1999

Law & Order: Special Victims Unit
TV • 1999

CSI: Crime Scene Investigation
TV • 2000

House
TV • 2004

Criminal Minds
TV • 2005

The Blacklist
TV • 2013

Saturday Night Live
TV • 1975

Castle
TV • 2009

Hawaii Five-0
TV • 2010

Law & Order: Criminal Intent
TV • 2001

Law & Order: Criminal Intent
TV • 2001

FBI
TV • 2018

Elementary
TV • 2012

JAG
TV • 1995

Person of Interest
TV • 2011

Desperate Housewives
TV • 2004