Warren Beatty

John Reed

Diane Keaton

Louise Bryant

Edward Herrmann

Max Eastman

Jerzy Kosiński

Grigory Zinoviev

Jack Nicholson

Eugene O'Neill

Paul Sorvino

Louis Fraina

Maureen Stapleton

Emma Goldman

Nicolas Coster

Paul Trullinger

M. Emmet Walsh

Speaker at Liberal Club

Ian Wolfe

Mr. Partlow

Bessie Love

Mrs. Partlow

MacIntyre Dixon

Carl Walters

Pat Starr

Helen Walters

Max Wright

Floyd Dell

George Plimpton

Horace Whigham

Harry Ditson

Maurice Becker

Kathryn Grody

Crystal Eastman

Brenda Currin

Marjorie Jones

Norman Chancer

Barney

Dolph Sweet

Big Bill Haywood

Ramon Bieri

Police Chief

Gene Hackman

Pete van Wherry

William Daniels

Julius Gerber

Dave King

Allan Benson

Joseph Buloff

Joe Volski

Stefan Gryff

Alex Gomberg

Roger Sloman

Vladimir I. Lenin

Shane Rimmer

MacAlpine

Jerry Hardin

Harry

Jack Kehoe

Eddie

Christopher Malcolm

CLP Party Member #1

R.G. Armstrong

Government Agent

Josef Sommer

State Department Official

Jan Tříska

Karl Radek

Åke Lindman

Scandinavian Escort

Roger Baldwin

Himself - Witness

Henry Miller

Himself - Witness

George Jessel

Himself - Witness

Miriam Margolyes

Woman with Notebook (uncredited)

John Ratzenberger

Communist Leader (uncredited)

Simon Jones

Louise Bryant's Colleague in France (uncredited)

Jill Goldston

Dancing Woman (uncredited)