Wedding guests awaiting the arrival of the bride suddenly become nervous when they notice that the table has been laid for 13... an ominous number. Their worries are confirmed when the bridal carriage pulls up outside bearing the lifeless bride and the corpses of three other guests. The suspicions rise between the thirteen guests, and the identity of the murderer is a shocking surprise.
Unfortunately the movie The Last Traitor is not yet available on HBO Max.
| Directing | Giuseppe Vari | Director |
| Costume & Make-Up | Corrado Blengini | Makeup Artist |
| Sound | Carlo Savina | Music |
| Camera | Angelo Lotti | Director of Photography |
| Art | Renato Postiglione | Art Direction |
| Costume & Make-Up | Luciana Blengini | Makeup Artist |
| Sound | Gastone Fedeli | Sound |
| Editing | Giuseppe Vari | Editor |
| Crew | Ted Rusoff | Additional Dialogue |
| Writing | Giuseppe Vari | Screenplay |
| Writing | Adriano Bolzoni | Screenplay |
| Production | Sergio Bollino | Production Assistant |
