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 | Renato Izzo | Writer |
| Writing | Alberto De Martino | Writer |
| Production | Guy Luongo | Executive Producer |
| Sound | Stelvio Cipriani | Original Music Composer |
| Writing | Adriano Bolzoni | Writer |
| Writing | Vincenzo Mannino | Writer |
| Directing | Alberto De Martino | Director |
| Production | Aldo Scavarda | Producer |
| Writing | Lorenzo Manning | Writer |
| Art | Serge-Henri Valcke | Set Decoration |
| Costume & Make-Up | Carla Indoni | Hairstylist |
| Costume & Make-Up | Amato Garbini | Makeup Artist |
| Art | Antonio Visone | Production Design |
| Sound | Giovanni Fratarcangeli | Sound |
| Editing | Otello Colangeli | Editor |
| Costume & Make-Up | Enrico Sabbatini | Costume Design |
| Sound | Fausto Ancillai | Sound Mixer |
| Costume & Make-Up | Alberto Travaglini | Makeup Artist |
| Camera | Joe D'Amato | Director of Photography |
