Sam Waterston

From The Law & Order Wiki

Sam Waterston
...as Jack McCoy (Season 18)
Character District Attorney Jack McCoy
Date of birth 15 November 1940
Place of birth Cambridge, Massachusetts
IMDb profile

Sam Waterston is an actor who is known for his portrayal of Executive ADA, and later District Attorney, Jack McCoy. His character replaced Benjamin Stone as the series Executive ADA, and Arthur Branch as DA. He first appeared in the Season 5 episode "Second Opinion".

Waterston also appeared in the Law & Order: Special Victims Unit episodes "Entitled" and "Blinded", and in the Law & Order: Trial by Jury episodes "The Abominable Showman" and "Skeleton". He also appeared in the franchise's only movie, "Exiled: A Law & Order Movie".

Jack McCoy appeared in the Homicide: Life on the Street crossover episodes "Baby, It's You: Part 2" and "Sideshow: Part 2".