Sam Waterston is known by most Americans as EADA Jack McCoy on the long lasting TV series, Law & Order, or as the TD Ameritrade spokesman. He is one of the longest lasting characters on Law & Order, and the only person in the prosecution that has been around for all three District Attorneys.
He has appeared in episodes of four different series with Richard Belzer: "Law & Order", "Homicide: Life on the Street", "Law & Order: Special Victims Unit" and "Law & Order: Trial by Jury".
He has two children, James and Elisabeth.
He is a close friend of his "Law & Order" co-star Dianne Wiest.