Broderick Crawford
Role: J. Edgar Hoover
James Wainwright
Role: Young Hoover
Michael Parks
Role: Robert F. Kennedy
José Ferrer
Role: Lionel McCoy
Celeste Holm
Role: Florence Hollister
Rip Torn
Role: Dwight Webb
Dan Dailey
Role: Clyde Tolson
Ronee Blakley
Role: Carrie DeWitt
Howard Da Silva
Role: Pres. Franklin D. Roosevelt
John Marley
Role: Dave Hindley
Michael Sacks
Role: Melvin Purvis
Raymond St. Jacques
Role: Martin Luther King
June Havoc
Role: Hoover's Mother
Lloyd Nolan
Role: Attorney General Harlan Stone
Andrew Duggan
Role: Pres. Lyndon B. Johnson
Jack Cassidy
Role: Damon Runyon
George Plimpton
Role: Quentin Reynolds
Lloyd Gough
Role: Walter Winchell
William Jordan
Role: Pres. John F. Kennedy
Brad Dexter
Role: Alvin Karpis
George D. Wallace
Role: Senator Joseph McCarthy
Henderson Forsythe
Role: Suydam
Fred J. Scollay
Role: Putnam
William Wellman Jr.
Role: Dwight Webb Sr.
Ellen Barber
Role: Janice Harper
Mary Alice Moore
Role: Miss Bryant
Jim Antonio
Role: Senator Kenneth McKellar
Gregg Abels
Role: President's Aide
Dan Resin
Role: President's Advisor
Penny du Pont
Role: Newscaster
John Bay
Role: Heywood Brown
Brooks Morton
Role: Earl Warren
Richard M. Dixon
Role: The President
Sam Chew Jr.
Role: FBI Agent
Paul Thomas
Role: FBI Agent
Ken Harvey
Role: FBI Agent
Jack Drummond
Role: FBI Agent
Colin Bremner
Role: FBI Agent
Hanns Manship
Role: FBI Agent
Tanya Roberts
Role: Stewardess
Margo Lynn Curtis
Role: Stewardess
John Stefano
Role: Harry Brunette
Jennifer Lee Pryor
Role: Ethel Brunette
Gwyn Gilliss
Role: Mary Jo Kopechne (voice)
Bruce Weitz
Role: Voice on Tape
Wyman Kane
Role: Senator Markum
Gordon Zimmerman
Role: Louis Lepke
Reno Carrel
Role: Dillinger
Frank Rohrbach
Role: White House Aide
Marshall Bordon
Role: White House Aide
Joe Mayo
Role: White House Aide
Joe ArrowSmith
Role: Newspaper Man
