The Shadow of the Black Organization (The Strange Illumination) Meitantei Conan : Season 15 Episode 37

Conan and the others attempt to solve the case of the murdered rock star. Near the end of the case, Eisuke tries to find info on how Kogoro solves it, only to be interrupted by Conan claiming to be tired. Eisuke swiftly glares at him, giving further speculation that he may be working with the organization, and his secret identity may no longer be safe.