Season
- Season 1 2013-07-08
Episode
- Episode 1: 28 Years of Darkness - The Sisters' Secret and the Mystery of Their Father's Death
- Episode 2: Recollection of Memories from 28 Years Ago - The True Identity of the Kidnapper
- Episode 3: Elder Sister's Poison, Younger Sister's Poison - The Kidnapper Who Disappeared and the Second Victim
- Episode 4: Father and Mother are Criminals - A Mysterious Threatening Call from the Perpetrator
- Episode 5: Final Episode Part I - The Shocking Poisonous Conclusion - A New Murder Case Begins
- Episode 6: The Mystery of the Random Serial Poisoning Case and the Terrifying Stalker
- Episode 7: The Two Women's Dispute over Inheritance…Is the Culprit the Daughter or the Mistress? The Stalker Looms
- Episode 8: Poisoned! 5th Incident Occurs...Suspects Narrowed Down to 3
- Episode 9: A Father’s Confession…The Stalker’s Tragic Past! The Mistress’ True Identity!
- Episode 10: Final Chapter~The Shocking Confession of the Real Murderer! The Stalker’s Fangs Attacks the Sugimura Family!
- Episode 11: Final Episode ~ Protect the Family from the Stalker! Sugimura Counterattacks!
Nameless Poison Season 1 Final Chapter~The Shocking Confession of the Real Murderer! The Stalker’s Fangs Attacks the Sugimura Family!
Saburo Sugimura works for the PR department of a company which his father-in-law Yoshichika Imada runs. One day, Yoshichika Imada tasks Saburo Sugimura with work regarding a man named Nobuo Kajita. A complicated story unfolds from the request.
