Henry Silva

as Johnny Cool / Salvatore Giordano

Elizabeth Montgomery

as Darien 'Dare' Guiness

Richard Anderson

as Correspondent

Jim Backus

as Louis Murphy

Joey Bishop

as Holmes, Used Car Salesman

Brad Dexter

as Lennart Crandall

Wanda Hendrix

as Miss Connolly

Hank Henry

as Larry, Bus Driver

Marc Lawrence

as Johnny Colini

John McGiver

as Oscar B. 'Oby' Hinds

Gregory Morton

as Jerry March

Mort Sahl

as Ben Morrow

Telly Savalas

as Vincenzo 'Vince' Santangelo

Joan Staley

as Suzy Blakely

Sammy Davis Jr.

as Educated

Elisha Cook Jr.

as Underworld Leader

John Dierkes

as Cripple

Frank Albertson

as Bill Blakely

Katharine Bard

as Mrs. Crandall

Steve Peck

as Kromlein

Joe Turkel

as Hoodlum

Elvia Allman

as Beauty Salon Receptionist

Robert Armstrong

as Underworld Leader

George Cisar

as George, a Bartender

Mary Scott

as Margaret Huntington

Douglas Henderson

as FBI Man

Douglass Dumbrille

as Corrupt City Council Member

Joseph Calleia

as Tourist

George N. Neise

as Adrian Guinness

Maria Andre

as Woman (uncredited)

Hal Baylor

Chris Willow Bird

Alex Bookston

Boyd Cabeen

Bill Catching

Jimmy Cross

Tony Dante

Michael Davis

Bruno Della Santina

Ken DuMain

George Eldredge

James W. Gavin

Art Gilmore

Bill Hickman

George Holmes

Clegg Hoyt

Edward Innes

Matty Jordan

Ray Kellogg

Pete Kooy

Joseph La Cava

Margie Liszt

Carmelo Manto

Peter Miller

Ralph Montgomery

Sol Murgi

Elizabeth Perry

Eddie Rosson

Pat Rosson

Cosmo Sardo

Sammy Shack

Mario Siletti

Theresa Testa

Kelly Thordsen

Victoria Vetri

Guy Way

Frank Wilcox

as FBI Agent (uncredited)