A giant prehistoric praying mantis, recently freed from the Arctic ice, voraciously preys on American military at the DEW Line and works its way south.
Col. Joe Parkman
Dr. Nedrick 'Ned' Jackson
Marge Blaine
Gen. Mark Ford
Prof. Anton Gunther
Corporal
Lt. Fred Pizar
Sgt. Pete Allen
Lou
Mrs. Farley
State Trooper
Capt. Frank Carver
Narrator (voice)
Photographer (uncredited)
C-47 Pilot (uncredited)
