James Woods
Role: Roy Marcus Cohn
Joe Don Baker
Role: Sen. Joseph McCarthy
Joseph Bologna
Role: Walter Winchell
Ed Flanders
Role: Joseph N. Welch
Frederic Forrest
Role: Dashiell Hammett
Pat Hingle
Role: J. Edgar Hoover
John McMartin
Role: Older Doctor
Josef Sommer
Role: Albert Cohn
Daniel Benzali
Role: Francis Joseph Cardinal Spellman
Tovah Feldshuh
Role: Iva Schlesinger
John Finn
Role: Sen. Charles Potter
Frances Foster
Role: First Annie Lee Moss
Allen Garfield
Role: Abe Feller
David Marshall Grant
Role: Robert F. Kennedy
Joe Grifasi
Role: Gerald Walpin
Daniel Hugh Kelly
Role: Congressman Neil Gallagher
Karen Ludwig
Role: Ethel Rosenberg
Novella Nelson
Role: Second Annie Lee Moss
Peter Maloney
Role: Ray Kaplan
Jeffrey Nordling
Role: G. David Schine
Fritz Weaver
Role: Sen. Everett Dirksen
Chuck Aber
Role: Sen. John L. McClellan
Lamont Arnold
Role: Male Nurse
Steve Aronson
Role: Judge Kaufman
Bernard Canepari
Role: New York Judge
Sam Coppola
Role: Carmine Galante
Brandon Danziger
Role: Young Roy Cohn
Patricia Dunnock
Role: Female Nurse
David Early
Role: Chauffeur
Fanni Green
Role: Juror #9
Lance Lewman
Role: Young Doctor
Larry John Meyers
Role: Frank Raichle
Zachary Mott
Role: Sam Garfield
Marty Roppelt
Role: German Reporter
Joe Petruzzi
Role: Peter Frazer
Joseph Scoren
Role: Milo Gandini
John Seitz
Role: Secretary of the Army Robert Stevens
Jack Skelly
Role: New York Waiter
Robin Thomas
Role: Reporter
Daniel von Bargen
Role: Clyde Tolson
Don Wadsworth
Role: English Reporter #2
Rick Warner
Role: Robert Morgenthau Jr.
Kate Young
Role: French Reporter
Rik Billock
Role: FBI Agent (uncredited)
Nikolai Bulganin
Role: Self (Parade Saluter) (archive footage) (uncredited)
Christopher Cussat
Role: Restaurant Patron (uncredited)
John W. Iwanonkiw
Role: Courtroom Reporter (uncredited)
Gary Cooper
Role: Self (archive footage) (uncredited)