Trailer
Diễn viên
James Arness
FBI Agent Robert Graham
Onslow Stevens
Brig. Gen. Robert O'Brien
Don Shelton
Trooper Capt. Fred Edwards
William Schallert
Ambulance Attendant
Forbes Murray
Government Official
Sean McClory
Maj. Kibbee
Sandy Descher
The Ellinson Girl
Chris Drake
Trooper Ed Blackburn
Olin Howland
Jensen
Ann Doran
Child Psychiatrist
Dub Taylor
Railroad Yard Watchman
Richard Deacon
Bald Reporter at L.A. News Conference
Kenner G. Kemp
Trooper #2
James Whitmore
Sgt. Ben Peterson
Joan Weldon
Dr. Pat Medford
Fess Parker
Alan Crotty
Dorothy Green
Matron
Willis Bouchey
Official at D.C. Meeting
Dick York
Teenager in Police Station
Edmund Gwenn
Dr. Harold Medford
Leonard Nimoy
Army Sergeant