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

Corporal

Lt. Fred Pizar

Sgt. Pete Allen

Lou

State Trooper

Capt. Frank Carver

Narrator (voice)

Photographer (uncredited)
May 1, 1957

Col. Joe Parkman

Dr. Nedrick 'Ned' Jackson

Marge Blaine

Gen. Mark Ford

Corporal

Lt. Fred Pizar

Sgt. Pete Allen

Lou

State Trooper

Capt. Frank Carver

Narrator (voice)

Photographer (uncredited)
