Ep. 3: The Pyrotechnician serial killer uses fireworks to snipe bystanders before being arrested.
Aired on January 13, 2020

As Hondomachi recovers from prior events, the team confronts a serial killer known as the Pyrotechnician. This individual employs fireworks as a diversion to shoot innocent bystanders. Investigations reveal the culprit is a war veteran obsessed with mass death. Authorities successfully apprehend the Pyrotechnician and detain him in a cell adjacent to Narihisago. Once secured, Narihisago examines the killer's psychological profile, identifying specific motives and vulnerabilities. He then systematically manipulates the Pyrotechnician, ultimately forcing him to take his own life. The Perforator observes this interaction from his nearby cell, witnessing the conclusion of the confrontation without intervening.
Episodes
- Ep. 1 · Sakaido wakes in the Perforator's well after Hondomachi is kidnapped by the serial killer.
- Ep. 2 · Sakaido encounters John Walker while Hondomachi orchestrates her own rescue from the Perforator.
- Ep. 3 · The Pyrotechnician serial killer uses fireworks to snipe bystanders before being arrested.
- Ep. 4 · Narihisago returns to investigate the Gravedigger copycat killer while Haruka Kazuta appears.
- Ep. 5 · Kazuta's identity as Gravedigger is exposed, leading to a fatal explosion and the reveal of Inami as the mastermind.
- Ep. 6 · Kazuta's Death and the Investigation into John Walker's Identity
- Ep. 7 · Hondomachi investigates Narihisago and Kiki Asukai while Momoki is framed for John Walker