An alien from planet Davanna, whose population has developed a terminal blood disease caused by nuclear radiation, is sent to Earth to acquire fresh human blood for his people.

Paul Birch
as Paul Johnson

Beverly Garland
as Nadine Story

Morgan Jones
as Harry Sherbourne

William Roerick
as Frederick W. Rochelle

Jonathan Haze
as Jeremy Perrin

Dick Miller
as Joe Piper

Anna Lee Carroll
as Davanna Woman

Pat Flynn
as Simmons

Barbara Bohrer
as Waitress

Roy Engel
as Desk Sergeant