Simon

Alan Arkin

Simon Mendelssohn

Madeline Kahn

Dr. Cynthia Mallory

William Finley

Fichandler

Wallace Shawn

Eric Van Dongen

Max Wright

Leon Hundertwasser

Fred Gwynne

Maj. Gen. Korey

Austin Pendleton

Dr. Carl Becker

Judy Graubart

Lisa

Adolph Green

Commune Leader

Keith Szarabajka

Josh

Ann Risley

Pam

David Susskind

Himself

Dick Cavett

Himself

Billie Perkins

Commune Member

Jayant

Barundi

Pierre Epstein

Military Aide

Roy Cooper

General's Aide

Rex Robbins

Army Doctor

David Warrilow

Blades

David Gideon

Security Guard

Hetty Galen

Simon's Mother (voice)

Remak Ramsay

TV Newscaster

Hansford Rowe

Priest Babcock Beastly

Yusef Bulos

Hemling Grotowsky

Jerry Mayer

Prof. Jerry Milstein

Sol Frieder

Rabbi Chaim Glassberg

William Griffis

Senator

Frank J. Lucas

Psychologist

George Riddle

Muttonchop Aide

Tom Kubiak

Roach Reaction Patient

Al Cerullo

Helicopter Pilot

Barbara Mongin

Institute Staff Member

Paula Gibson

Melody

James Dukas

Narrator (voice)

Jim Saxon

Commune Member

Michael Earl

Commune Member

Jay Lowman

Commune Member

Steven Nash

Commune Member

Barbara Bergen

Commune Member

Joyce Adams

Commune Member

Bonnie Deroski

Commune Member

Kathryn Cordes

Commune Member

Leslie Frances Williams

Commune Member

Nick Pippin

Commune Member

Ed Karvoski

Commune Member

Mary Lou Kleinbach

Commune Member

Richard Bassett

Commune Member

Phil Witt

Commune Member

Isam Culver

Commune Member

Rickey Murray

Commune Member

Stephanie Segal

Commune Member

Max Goff

Commune Member

Mary Donnet

Commune Member

Don Stitt

Commune Member

Nikki Kollins

Commune Member

Jenny Gault

Commune Member

Regina Rodwell

Commune Member

Schorling Schneider

Commune Member

Tina Austin

Commune Member

Jeffrey Bacon

Commune Member

Elizabeth Wingate

Commune Member

Joan Adams

Commune Member

Lisa Maurer

Commune Member

Louise Lasser

Doris (voice) (uncredited)