unknown アンノウン - Season 1 Episode 4
- Genre: Drama, Mystery
- Studio: tv asahi
- Keyword: vampire, undercover agent, assault, supernatural, romance, co-workers relationship, police officer, thriller
- Cast: Mitsuki Takahata, Kei Tanaka, Keita Machida, Kumiko Aso, Kotaro Yoshida, Shinya Kote