- Country: Italy, Spain
- Genres: Thriller
- Release: 1969-06-06
- Director: Javier Setó
- Writers: Santiago Moncada , Javier Setó , Gianfranco Clerici
- Language: Spanish
- Stars: Larry Ward , Larry Ward , Teresa Gimpera , Giacomo Rossi Stuart , Fernando Sánchez Polack , Eugenio Navarro , Javier de Rivera , José Bastida , José Bastida , Silvana Venturelli
- Runtime: 91 min
- Awards: N/A
- AKA: Viaje al vacío (Spain) , Shadow of Death (United States of America) , The Emptiness All Around (Netherlands the) , Invisible Assassin (United States of America) , Der Phantom-Killer schlägt zu , L'assassin fantôme (France, French Republic) , Shadow of Death , Macabre (United States of America) , Oi dolofonoi horevoun ta mesanyhta (Greece) , Shadow of Death (United Kingdom) , Il vuoto intorno (Italy) , L'assassino fantasma (Italy) , Viaje al vacío
- Plot: A scheming blonde plots to steal her husband's money, not by killing him, but by driving him to the brink of insanity so that, once he's institutionalized, she and his twin brother (whom she's having an affair with!) can run his estate and have all his dough!
- IMDB:tt0062438
Macabre Cast · · · ALL
Javier Setó
Director
Larry Ward
Peter / John
Teresa Gimpera
Denise
Giacomo Rossi Stuart
Gert Muller
Silvana Venturelli
Annie
Fernando Sánchez Polack
Comisario
Eugenio Navarro
Dr. Durán
Javier de Rivera
Dr. Hernández
José Bastida
Peter / John (set ups)