L'assassino... è al telefono

Osvaldo Ruggieri as Thomas Brown Ada Pometti as Nurse Alessandro Perrella as Psychiatrist Telly Savalas as Ranko Drasovic Anne Heywood as Eleanor Loraine Willeke van Ammelrooy as Dorothy Rossella Falk as Margaret Vervoort Roger Van Hool as Peter Vervoort

Stelvio Cipriani Original Music Composer Alberto De Martino Director, Writer Serge-Henri Valcke Set Decoration Joe D'Amato Director of Photography