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Casting

Director

Gordon Douglas

Producer

David Weisbart

Screenplay

Ted Sherdeman

Story

George Worthing Yates

Original Music Composer

Bronislau Kaper

Director of Photography

Sidney Hickox

Editor

Thomas Reilly

Art Direction

Stanley Fleischer

Set Decoration

G.W. Berntsen

Makeup Artist

Gordon Bau, Henry Vilardo

James Whitmore
James WhitmoreSgt. Ben Peterson
James Arness
James ArnessFBI Agent Robert Graham
Joan Weldon
Joan WeldonDr. Pat Medford
Edmund Gwenn
Edmund GwennDr. Harold Medford
Onslow Stevens
Onslow StevensBrig. Gen. Robert O'Brien
Sean McClory
Sean McCloryMaj. Kibbee
Sandy Descher
Sandy DescherThe Ellinson Girl
Chris Drake
Chris DrakeTrooper Ed Blackburn
Don Shelton
Don SheltonTrooper Capt. Fred Edwards
Fess Parker
Fess ParkerAlan Crotty
?
Mary Alan HokansonMrs. Lodge
Olin Howland
Olin HowlandJensen
William Schallert
William SchallertAmbulance Attendant
Ann Doran
Ann DoranChild Psychiatrist
Dub Taylor
Dub TaylorRailroad Yard Watchman
Leonard Nimoy
Leonard NimoyArmy Sergeant
Richard Deacon
Richard DeaconBald Reporter at L.A. News Conference
Forbes Murray
Forbes MurrayGovernment Official
Kenner G. Kemp
Kenner G. KempTrooper #2
?
Charles PerrySoldier
Dorothy Green
Dorothy GreenMatron
Willis Bouchey
Willis BoucheyOfficial at D.C. Meeting
?
Mary Lou HollowayBlonde at Police Station
Dick York
Dick YorkTeenager in Police Station