Elsewhere (1982–88), and he has had roles in The Negotiator, The Good Son, Horns, Contact, The Green Mile, Dancer in the Dark, Disturbia, The Long Kiss Goodnight, The Rock and 12 Monkeys.

In 2006, Morse had a recurring role as Detective Michael Tritter on the medical drama series House, for which he received an Emmy Award nomination.

[5] Morse became a member that summer at age 17 and spent six years performing there while living in the Fort Hill section of Roxbury.

[6] In 1975, Jauchem, by then the artistic director of the Boston Repertory Theater, adapted and directed a stage musical version of The Point!

In the late 1970s, Morse moved from Boston to New York to further his stage career with the Circle Repertory Company and to study acting at the William Esper Studio.

He played Dr. Jack "Boomer" Morrison, a young physician who is forced to deal with the death of his wife and the struggles of a single parent professional.

[13] In 2002, Morse starred as Mike Olshansky, an ex-Philadelphia police officer turned cab driver, in the television film Hack.

Film critic and commentator John Podhoretz wrote that Morse is a "largely unsung character actor who enlivens and deepens every movie fortunate enough to have him in the cast.

[16] In 2008, Morse portrayed George Washington in the HBO miniseries John Adams, for which his nose was made bigger with prosthetics.

We didn't have a lot of time, because they asked me to do this about three weeks before they started shooting, and I just kept looking at these portraits and thinking 'this man's face is so commanding.'

He also portrays Washington in voice form as part of The Hall of Presidents show in Walt Disney World Resort's Magic Kingdom.

[15] In 2010, he guest starred in two episodes of the HBO drama series Treme as Lt. Terry Colson of the New Orleans Police Department.

Later that year, Morse won the best actor award at the Karlovy Vary International Film Festival for his role in Collaborator.