Ep. 4: Authorities search for Kaika Itsuki amid rail shutdowns and election tensions.
Aired on October 28, 2019

4
Following a series of suicides, the rail network closes, prompting Morinaga to lead the search for Kaika Itsuki. Kasumigaseki Vice Minister of Justice Yoshifumi Sekuro suggests Itsuki may not have violated the law. Assistant Officer Hiasu Sekuro, the vice minister's niece, joins Seizaki's team. Itsuki releases a video proposing a new suicide law, polarizing election candidates into opposing factions. Kasumigaseki Police Director of Unit 1 Torao also assists the investigation. Days before the election, Seizaki's team fails to locate Itsuki or Ai Magase, lacking evidence of abetment. Despite this, Seizaki eventually acquires data concerning Ai Magase, though the search remains unresolved.
Episodes
- Ep. 1 · Prosecutor Seizaki discovers a bloodstained document marked with F during a pharmaceutical scandal probe.
- Ep. 2 · Seizaki questions Emiko Hiramatsu and discovers a link between Nomaru and Kaika Itsuki.
- Ep. 3 · Shiniki's Political Experiment and the Nyux Suicide Phenomenon
- Ep. 4 · Authorities search for Kaika Itsuki amid rail shutdowns and election tensions.
- Ep. 5 · Seizaki and Sekuro investigate Doctor Kurauzu Sakabe and Ai Magase's disturbing influence while Itsuki proposes a debate.
- Ep. 6 · Seizaki plots kidnapping Itsuki while Nomaru uses a boy to sway the debate
- Ep. 7 · Itsuki's Sacrifice and Magase's Deadly Whisper Reveal a Sinister Pattern
- Ep. 8 · Suicide law enacted in Shiniki as Seizaki faces torment and international scrutiny