TV series
Mikoto, a forensic investigative examiner, and her partners trace down the evidence of crimes and unravel the puzzles behind mysterious deaths.
Streaming, rental and purchase options
Checked Sep 2, 2026
Unnatural is available to stream on Netflix and Rakuten Viki in United States. Use the direct links below to open the provider.
Mikoto, a forensic investigative examiner, and her partners trace down the evidence of crimes and unravel the puzzles behind mysterious deaths.
Choose an episode, then use the watch options above for the show.
Episode 1
A man died suddenly. His parents ask UDI for help. It is rumored that his girlfriends, a researcher, created a poison to kill him.
Guest stars Sayaka Yamaguchi, Seiji Fukushi, Kunio Murai, Yoko Ishino, Konatsu Tanaka, Yoshihiro Nozoe, Satomi Nagano, Shinichiro Uchida
Episode 2
A family committed charcoal burning suicide. However, it turns out that one of the bodies died from hypothermia and was found a piece of paper in her stomach.
Guest stars Sayuri Matsumura, Rio Kanno, Eishin, Nikumaro, 麻仓卓也, Fumi Moriya, 细野今日子, Kurumi Inagaki
Episode 3
Mikoto Misumi is asked to testify in a trial for the prosecution. However, pretty soon she discovers inconsistencies in the case.
Guest stars Mitsuru Fukikoshi, Yoichi Nukumizu, Yousuke Saito, Kei Otozuki, Yutaka Shimizu, Megumi Ujiie, Ryosuke Otani, Ippei Hikaru
Episode 4
Misumi's mother comes to her to ask for help in a case where a man died in a road accident.
Guest stars Naho Toda, Yoshiyuki Tsubokura, Shihou Harumi, Daisuke Kikuta, Ryohei Abe, 藤村真優, Jouji Shibue, Hirota Otsuka
Episode 5
Misumi's team works to find the truth behind an apparent drowning accident.
Guest stars Yuki Izumisawa, Airi Kido, Sato Naoko, Takeo Gozu, Mika Aoki
Episode 6
When Yuko gets entangled in a murder investigation, the UDI department steps in to help her.
Guest stars Terunosuke Takezai, Hiroki Suzuki, Hiroaki Iwanaga, Katsuyuki Miyake, Tsuyoshi Nakano, Hanazuki Yuma
Episode 7
A high school student defies Mikoto Misumi to discover the truth behind the death of another student.
Guest stars Onodera Akira, Ayumu Mochizuki, Fuju Kamio, Eri Fuse, Yukijiro Hotaru, Ai Moritaka, Gaku Oshida, Hijiri Sakurai
Episode 8
UDI has to discover the identities of the victims of a fire that could have been an arson.
Guest stars Masatô Ibu, Mickey Curtis, Katsumi Kiba, Hiroyuki Onoue, Wataru Ichinose, Elen, Mikan Hazuki, 松熊つる松
Episode 9
UDI investigates the death of a young woman found in a suitcase, a case that may be connected to the death of Nakado's girlfriend 10 years ago.
Guest stars Hiroyuki Onoue, Goro Oishi, Yûrei Yanagi, 黒沢恵梨
Episode 10
After the fallout of the previous episode, UDI has to find proof of the involvement of Takase in the deaths of 26 people.
Guest stars Hiroyuki Onoue, Tomiyuki Kunihiro
Episode information updated Sep 17, 2026
Satomi IshiharaMisumi Mikoto
Arata IuraNakada Kei
Masataka KubotaKube Rokuro
Mikako IchikawaShoji Yuko
Yutaka MatsushigeKamikura Yasuo
Yukiya KitamuraShishido Riichi
Hiroko YakushimaruMisumi Natsuyo
Koji OhkuraMori Tadaharu
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