Kjófu no čóendžin (E44)

A trail of blood is linked to a series of murders. The Ultra Guard examines it, and Kiriyama decides that the DNA from the blood is human, even though the stamina of the killer is equal to an ape. Dan and Anne are perplexed as they hover around the zoo's primate exhibit. Little do they know the killer is there as Gorry, a groundskeeper, who has the body of a human and the mind of a gorilla. (Prime Video)