Kenneth Harlan

as Sammy Klein

as Gas Works Policeman

as Eddie Mohr

as Jedson

as John Hampton, Indian Agent

as Territorial Commissioner

as Borman

as First Warden

as Cutler

as Fingerprint Division Lieutenant (uncredited)

as George "Mack" McColl

as Police Lt. Jim Brady

as Mark Kenyon

as Captain Sneed

as Editor Keenan

as Agent Brown

as Flight Dispatcher

as FBI Chief Colton

as Capt. Holding [Ch. 1]

as Police Lt. Cosgrove

as Sheriff Hackett

as Detective Dunlap

as Banker Carruthers

as Tom Wilson

as Jim

as Capt. Hank MacFarland

as Jim Adams

as Frank Billings

as Ship's Officer (uncredited)

as Captain

as Capt. Lathrop

as Dyer, Factory Gate Guard (uncredited)

as Dalton Stull

as Ludlow

as Jerry Connell (uncredited)

as Commander Wayne

as Blake

as Charles Roberts (uncredited)

as Actor (uncredited)

as Miller

as Chas. Higgins

as FBI Chief Clive Anderson [Chs. 13-15]

as Bob Randall

as General Terry

as Stan - Star Advertising Manager (uncredited)

as Reporter at Wade's Lab

as Man at New York Airport

as Mr. John Trumbell - Juror #3

as John Marsh

as Varsity Football Coach

as Smooth Adair

as Allen Spencer

as Angry Businessman

as Laundry Owner

as Caldwell

as McBride

as John Harper

as Mr. Richards

as Elmer Ross

as Mr. Remington

as Marvin Spencer

as First Officer

as Bigelow

as Spencer, Trader

as [scenes deleted]

as Carter Snowden

as Captain Breen

as Roger 'Angel' Carroll

as Mr. Bright

as Hotel Manager (uncredited)

as Major Taylor

as Reporter (uncredited)

as Phineas T. Flagg

as Eddie

as Real G-Man

as William Stevens

as Bowman

as 1st Detective

as Lead steward

as Police Surgeon

as Mr. Andrews

as Department of Commerce Inspector

as G-Man

as Peter Milnor

as 'Chick'

as Stephen Martin

as Marshal Bill Graves

as Leading man

as Jim Davis

as Matt Peasley

as Bob

as Peter Lawton-Bond

as Ward

as Captain Harry Drake

as Clay Conning

as Jim Thorne

as Bill / Jack Mason

as Blair Thompson

as Cpl. Jim Sharkey

as Tim Regan

as Jack Compton

as Sergeant Lee

as Tom Palmer

as Himself

as Peter Van Horne

as Chuck Lightfoot

as Barry Weston

as John Doe Smith

as Milt Mulford Jr

as Jimmie York

as David Lacy

as Ross Cavanagh

as Arthur Carleton

as Colin Arnold

as Billy Laidlaw

as Brian Kent

as (uncredited)

as Brian Kelly

as White Man

as Stephen Winthrop

as Judson Forrest

as Craig Spaulding

as David Kent

as Hugh Kildair / Gilbert Kildair

as Rufus Asher

as Philip Marvin

as Danny O'Rourke

as The Virginian

as Robert Belmar

as Duncan Van Norman

as Martin Norries

as David Graham

as Allen Carver

as Alan Randolph

as Wallace Foster

as Bill Billings

as Cpl. Bob Fitzgerald

as Donald Wales

as Bob Jones

as Jim Bradley

as Roger Strong

as Tom Smith

as John Warren

as Dr. Harmon

as Clarence Brooks

as Dr. Wilmot Allen

as Donald Keap

as David Rogers

as John Graham

as DeWitt Spense

as Howard Murray

as Dick Frothingham

as Joe Blondin / Pierrot

as Prentice Tiller

as Billy Ravensworth

as Douglas Seward

as Frank Harris

as Steele Valiant

as Phillip Smith

as John Rand

as Preston Winfield

as Billy Geary

as George Fowler

as Horace Gray

as Harry Brent