A woman whose husband was murdered five years previously, is stalked by his killer, who wants to eliminate her as a potential witness. What he doesn't know is that the shock of his murder caused her to have amnesia, and she doesn't remember anything.
Unfortunately the movie The Killer Is on the Phone is not yet available on HBO Max.
| Writing | Vincenzo Mannino | Writer |
| Production | Guy Luongo | Executive Producer |
| Writing | Adriano Bolzoni | Writer |
| Sound | Stelvio Cipriani | Original Music Composer |
| Writing | Renato Izzo | Writer |
| Writing | Lorenzo Manning | Writer |
| Writing | Alberto De Martino | Writer |
| Production | Aldo Scavarda | Producer |
| Directing | Alberto De Martino | Director |
| Camera | Joe D'Amato | Director of Photography |
| Editing | Otello Colangeli | Editor |
| Art | Antonio Visone | Production Design |
| Art | Serge-Henri Valcke | Set Decoration |
| Costume & Make-Up | Enrico Sabbatini | Costume Design |
| Sound | Giovanni Fratarcangeli | Sound |
| Sound | Fausto Ancillai | Sound Mixer |
| Costume & Make-Up | Carla Indoni | Hairstylist |
| Costume & Make-Up | Amato Garbini | Makeup Artist |
| Costume & Make-Up | Alberto Travaglini | Makeup Artist |
