Broderick Crawford

J. Edgar Hoover

James Wainwright

Young Hoover

Michael Parks

Robert F. Kennedy

José Ferrer

Lionel McCoy

Celeste Holm

Florence Hollister

Rip Torn

Dwight Webb

Dan Dailey

Clyde Tolson

Ronee Blakley

Carrie DeWitt

Howard Da Silva

Pres. Franklin D. Roosevelt

John Marley

Dave Hindley

Michael Sacks

Melvin Purvis

Raymond St. Jacques

Martin Luther King

June Havoc

Hoover's Mother

Lloyd Nolan

Attorney General Harlan Stone

Andrew Duggan

Pres. Lyndon B. Johnson

Jack Cassidy

Damon Runyon

George Plimpton

Quentin Reynolds

Lloyd Gough

Walter Winchell

William Jordan

Pres. John F. Kennedy

Brad Dexter

Alvin Karpis

George D. Wallace

Senator Joseph McCarthy

Henderson Forsythe

Suydam

Fred J. Scollay

Putnam

William Wellman Jr.

Dwight Webb Sr.

Ellen Barber

Janice Harper

Art Lund

Benchley

Mary Alice Moore

Miss Bryant

Jim Antonio

Senator Kenneth McKellar

Gregg Abels

President's Aide

Dan Resin

President's Advisor

James Dixon

Reilly

Penny du Pont

Newscaster

Alvin Miles

Valet

John Bay

Heywood Brown

Brooks Morton

Earl Warren

Richard M. Dixon

The President

James Dukas

Frank

Ron Faber

Hijacker

Sam Chew Jr.

FBI Agent

Paul Thomas

FBI Agent

Ken Harvey

FBI Agent

Jack Drummond

FBI Agent

Colin Bremner

FBI Agent

Dana Rowe

FBI Agent

Hanns Manship

FBI Agent

Ed Nast

FBI Agent

Tanya Roberts

Stewardess

Margo Lynn Curtis

Stewardess

Larry Pine

Kelly

John Stefano

Harry Brunette

Jennifer Lee Pryor

Ethel Brunette

Gwyn Gilliss

Mary Jo Kopechne (voice)

Bruce Weitz

Voice on Tape

Wyman Kane

Senator Markum

Gordon Zimmerman

Louis Lepke

Marty Lee

Mafia Man

Reno Carrel

Dillinger

Frank Rohrbach

White House Aide

Marshall Bordon

White House Aide

Joe Mayo

White House Aide

Joe ArrowSmith

Newspaper Man