Also Known As:
- Horror in the Midnight Sun
- Invasion of the Animal People
- Space Invasion from Lapland
- Space Invasion of Lapland
- Terror in the Midnight Sun
- Virgil W. Vogel
- Robert M. Fresco
- Arthur C. Pierce
- Barbara Wilson ... Diane Wilson
- Sten Gester ... Erik Engström
- Robert Burton ... Dr. Frederick Wilson
- Bengt Blomgren ... Col. Robert Bottiger
- Åke Grönberg ... Dr. Henrik
- Gösta Prüzelius ... Dr. Walter Ullman
- John Carradine ... Narrator (voice: English version)
- Brita Borg ... Singer
- Doreen Denning ... Anna
- Ittla Frodi ... Girlfriend in Volvo
- Fred Hoffman ... Doctor (US TV version)
- Allan Johansson ...
- George Mitchell ... Diane's psychiatrist (US TV version)
- Gustaf Unger ... Air passenger with dark glasses
- Katherine Victor ... Diane's mother (US TV version)
- Lars Åhrén ... The Monster / An alien / Tall nightclub soldier