Beyond Law & Order, Waterston has impressed on the big and small screen for more than six decades.

DR. KILDARE (1965)

His first screen credit? Two episodes of this Richard Chamberlain-starring NBC medical drama.

THE GREAT GATSBY (1974)

This was the first—but not the last—big-screen adaptation of F. Scott Fitzgerald’s classic novel. Waterston, who played Nick Carraway, recently admitted to talk show host Stephen Colbert that he was starstruck acting alongside Robert Redford (i.e., Jay Gatsby).

CAPRICORN ONE (1977)

In this sci-fi thriller (later referenced on a 1999 episode of Friends), Waterston played a NASA astronaut involved in a covert mission. The eclectic cast included James Brolin, O.J. Simpson, Elliott Gould, Telly Savalas and Brenda Vaccaro.

CRIMES & MISDEMEANORS (1989)

He popped up in two Woody Allen 1980s classics: Hannah and Her Sisters and this thoughtprovoking crime thriller. His future Law & Order costar Jerry Orbach also appeared in the film, though the two don’t share any scenes together.

THE KILLING FIELDS (1984)

Waterston landed a Best Actor Oscar nomination for his portrayal of Sydney Schanberg, a real-life journalist who goes on assignment to cover the Cambodian Civil War. (His costar Haing S. Ngor won in the supporting category.) “It was certainly a high point of my career,” he says of the acclaimed drama.