Also Known As:
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- De otro mundo
- Emisario del otro mundo
- Gesandter des Grauens
- Il vampiro del pianeta rosso
- Not of This Earth
- Roger Corman
- Charles B. Griffith
- Mark Hanna
- Paul Birch ... Paul Johnson
- Beverly Garland ... Nurse Nadine Storey
- Morgan Jones ... Police Officer Harry Sherbourne
- William Roerick ... Dr. Frederick W. Rochelle
- Jonathan Haze ... Jeremy Perrin
- Dick Miller ... Joe Piper (salesman) (as Richard Miller)
- Anna Lee Carroll ... Woman from Davanna (as Anne Carroll)
- Pat Flynn ... Police Officer Simmons
- Barbara Bohrer ... Waitress
- Roy Engel ... Police Sgt. George Walton
- Tamar Cooper ... Nurse Joanne Oxford
- Harold Fong ... The Speciman
- Lyle Latell ...
- Gail Ganley ... Teenage Girl
- Ralph Reed ... Teenage Boy
- Tom Graeff ... Car Park Attendant
- Hank Mann ... Bum
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