Gordon Clapp (born September 24, 1948) is an American actor, best known for portraying the role of Det. Greg Medavoy for all 12 seasons on the television series NYPD Blue, winning an Emmy Award in 1998.
In 1995, he played Father Paul in Her Hidden Truth. In 2007 Clapp voiced Horny The Clown in the horror film Drive-Thru. In 2007 Clapp also appeared as Det Dick Walenski in "In Birth and Death," in Season 3 Episode 2 of Criminal Minds. Clapp portrayed a corrupt police officer in a 2008 episode of Cold Case. He played the main antagonist Gen. Peter Randall in the Prototype video game. Clapp plays the father of Ellen (Rose Byrne) in the F/X show Damages.