Il Mostro: Story, Cast and Series Facts

Story and premise

Eight double murders. Seventeen years of terror. Always the same weapon. A .22 caliber Beretta. One of the longest and most complex Italian investigations into the first and most brutal serial killer in the country's history: Il Mostro di Firenze. A series based on true events, direct testimonies, procedural documents and journalistic investigations. All terribly true. Because we believe that telling the truth, and only that, is the only way to bring justice to the victims. In a story where there have been many possible monsters, over time and investigations, our story focuses on them, the possible monsters, from their point of view. Because the monster, in the end, could be anyone.

Series details

• Title: Il Mostro
• Format: Scripted
• Language: Italian
• Genres: Drama, Crime, Thriller
• Premiere date: 2025-10-22
• Final broadcast date listed: 2025-10-22
• Status in TVmaze: Ended
• Web channel listed by TVmaze: Netflix
• Typical episode runtime: 59 minutes
• TVmaze community rating: 5.6/10
• TVMaze ID: 85847
• IMDb ID: tt29457135
• TVDB ID: 440698

Cast and credited roles

• Marco Bullitta — Stefano Mele
• Valentino Mannias — Salvatore Vinci
• Francesca Olia — Barbara Locci
• Liliana Bottone — Silvia Della Monica
• Giacomo Fadda — Francesco Vinci
• Antonio Tintis — Giovanni Mele
• Giordano Mannu — TBD

Seasons in the TVmaze catalogue

• Season 1: premiered 2025-10-22; final listed air date 2025-10-22; episode order: 4.

Source and licence

Adapted from Il Mostro on TVmaze. The synopsis is reproduced as plain text; catalogue facts, cast and season records are selected and reformatted. This adapted text is available under CC BY-SA 4.0, following the TVmaze API licence. Network and web-channel credits identify the service listed in this source; they do not establish current streaming availability.