Made stage debut at age six as the Page in Jean Anouilh's "Antigone"; directed by his father
First appearance with the New York Shakespeare Festival (NYSF) in "As You Like It"
Made Broadway debut in Arthur Kopit's "Oh Dad, Poor Dad, Mama's Hung You in the Closet and I'm Feelin' So Sad"
First appeared on television in "Camera Three" (CBS)
Made film debut in the unreleased feature "The Plastic Dome of Norma Jean"
First released feature, "Fitzwilly"
Cast as Prince Hal in the NYSF productions of "Henry IV, Part I" and "Henry IV, Part II"
Starred in Kopit's play "Indians"
Had featured role in the off-Broadway play "The Trial of the Catonsville Nine"
Starred opposite Kathleen Widdoes in NYSF Central Park production of "Much Ado About Nothing"; later moved to Broadway (aired on CBS in 1974)
Made first TV-movie; played Tom in an adaptation of Tennessee Williams' "The Glass Menagerie" (ABC), starring Katharine Hepburn; garnered first Emmy nomination
First came to attention in a major film "The Great Gatsby"; played the narrator Nick Carraway; initial film collaboration with Mia Farrow
Co-starred with Tuesday Weld in the TV-movie "Reflections on a Murder"
Landed title role in the NYSF production of "Hamlet"
Acted in the features "Journey Into Fear" and "Dandy, the All American Girl"
Made first appearance in a Woody Allen film with a role in "Interiors"
Returned to TV-movies after five years to star opposite Carol Burnett and Ned Beatty in the acclaimed ABC drama "Friendly Fire"
Played title role in the feature "Sweet William"
Featured in "Hopscotch" and Michael Cimino's disastrous "Heaven's Gate"
Co-starred in the Broadway comedy "Lunch Hour"
Played physicist J. Robert Oppenheimer in the seven-part PBS miniseries "Oppenheimer"
Played physicist Quentin E. Deverill on the short-lived CBS adventure series "Q.E.D."
Received Best Actor Oscar nomination for his leading role as an American journalist in Cambodia in the feature film "The Killing Fields"
Co-starred with Mary Tyler Moore and Robert Preston in the HBO romance "Finnegan Begin Again"
Acted on Broadway in "Benefactors" alongside Glenn Close and Mary Beth Hurt
Appeared in Woody Allen's "Hannah and Her Sisters"
Re-teamed with Allen for the film "September"
Played Abraham Lincoln in the two-part NBC movie "Gore Vidal's Lincoln"; Mary Tyler Moore co-starred as Mary Todd Lincoln
Starred with Robert Prosky in "A Walk in the Woods," a play dealing with arms negotiation between the U.S. and the USSR
Fourth film with Allen, "Crimes and Misdemeanors"
Starred on the NBC drama series "I'll Fly Away"; received Emmy nominations in 1992 and 1993
Co-starred in the period drama "The Man in the Moon," starring a young Reese Witherspoon
Made TV directorial debut with the "Since Walter" episode of "I'll Fly Away" (NBC)
Returned to the NYC stage to play Abraham Lincoln in a revival of Robert Sherwood's "Abe Lincoln in Illinois"; received a Tony nomination
Played the mild-mannered husband of Kathleen Turner's "Serial Mom"
Co-starred with Kirstie Alley in the acclaimed TV-movie "David's Mother" (CBS)
Joined the cast of the NBC drama series "Law & Order" as assistant district attorney Jack McCoy, replacing Michael Moriarty; in 2007, his character was promoted to New York district attorney, filling the slot vacated by Fred Thompson's Arthur Branch; earned Emmy (1997, 1999, 2000) nominations; series cancelled after 20 years on the air
Feature film producing debut, "The Journey of August King"; also played small role
Played the U.S. President in the political thriller "Shadow Conspiracy"
Featured as McCoy in "Exiled: A Law & Order Movie" (NBC)
Starred as Dr. Karl Koster, a savior of Danish Jews during the Nazi's reign of terror in the fact-based TV-movie "Miracle at Midnight" (ABC)
Starred with son James Waterston in a production of "Long Day's Journey Into Night" at Syracuse Stage
Produced the Showtime TV-movie "A House Divided"; also co-starred as the plantation owner who fathered a biracial child
Co-starred in the NBC TV-movie "The Matthew Shepard Story" as the father of slain college student
Appeared in "Le divorce," starring Kate Hudson and Naomi Watts
Appeared as Polonius in the Shakespeare in the Park production of "Hamlet"
Received a star on the Hollywood Walk of Fame
Returned to series television on Aaron Sorkin's drama series "The Newsroom" (HBO) as a network news executive