And stalwart Egoyanite Bruce Greenwood enhances the drama as an actor playing Clarence Ussher, an American doctor in Turkey whose real journal, published in 1917, paid witness to history then, just as Egoyan does so ardently now.
Lisa Schwarzbaum, Entertainment Weekly 11/23/02

No doubt the climax of this exorcism is when Saroyan, his star, Martin (Bruce Greenwood, excellent as always), the scriptwriter Rouben (Eric Bogosian) and Ani arrive in a limousine where the international premiere of the film is about to take place.
Lorena Cancela, Metro, Winter 04

Bruce Greenwood, who plays the role of the American doctor in the movie-within-the-movie, brings a heightened reality to his performance, as does Koteas.
Louis B. Hobson, Edmonton Sun 12/6/02

Koteas and Greenwood get one magnificent scene each.
Mike D'Angelo panix.com

The sterling and large ensemble cast, led by David Alpay, includes Arsinee Khanjian, Bruce Greenwood, Brent Carver, Christopher Plummer, and Eric Bogosian.
Bruce Kirkland Toronto Sun 9/5/02

...his capable cast, which also includes Eric Bogosian and Bruce Greenwood, struggling to make the proceedings feel like more than an artfully assembled intellectual exercise.
Hollywood Reporter 5/15/02

[David Alpay] holds his own with Christopher Plummer, Bruce Greenwood and Elias Koteas!
Brian Johnson, Maclean's, 11/18/02

What critics had to say about Bruce's role:

In the film-within-the-film, Bruce Greenwood is an American missionary in Turkey during the First World War (the real Clarence Ussher is the author of the film's primary research source). Though I could have done without the parade of distracting handlebar mustaches announcing "Period Piece," I wish Egoyan had made the Ussher film. The movie set in the past is a thousand times more compelling: With little dialogue, a father loses a son, bodies are torn apart, and we're allowed to feel the emotion that's buried in the rest of Ararat. It takes a simple, old-fashioned costume drama to make us feel anything, to articulate what the endless present day chatter never does: Historical indifference comes at a price.
Katrina Onstad National Post 11/19/02

Edward's film is based on a real book, An American Physician in Turkey, Clarence Ussher's eyewitness account of the 1915 masssacre. In one of Ararat's most mind-blowing scenes, Ani rushes onto the set, disrupting a panorama of carnage. Martin (Greenwood), the actor playing Ussher, looks up from the girl he's pretending to treat, explains how her father's eyes were gouged out and her mother's unborn child was ripped from her belly, then asks Ani, 'Who the fu*** are you?' It's as if Ussher, the actor playing him and the actor playing the actor are all exasperated with the layers of framing that threaten to suffocate the real story. And so's the viewer.
Brian Johnson, Maclean's 11/18/02