India, Dec. 20 -- If you have just finished binge-watching Human Specimens, the twisted new Japanese drama on Prime Video, we suggest you grab a glass of water first to soothe that churning stomach of yours. We bet you can't stop thinking about why Shiro Sakaki ultimately turned his own son into a "butterfly". Hopefully, this Human Specimens ending explained piece will help with that.

Helmed by Ryuichi Hiroki, this psychological thriller series is based on Kanae Minato's novel of the same name. It stars Hidetoshi Nishijima, best known for his role in the Academy Award-winning film Drive My Car (2021) and Somegoro Ichikawa, a rising star in Kabuki theatre.

The five-part Japanese drama, which dropped all its episodes on 19 December 2025, ...