The following manga was released with each series based on the concurrent era as the anime.
The first manga was based on the 1968 Humanoid Monster Bem anime. Written by Ken Tanaka (田中憲), it was re-released into reprinted versions by Kodansha in 2002 and 2010.
The second manga was based on the 2006 Humanoid Monster Bem anime. Written by Hidebu Takahashi (高橋 秀武) and serialized on "Weekly Young Jump" magazine. The story takes place in Europe after World War 2, where the trio are escaped test subjects.
A manga version of the BEM (2019) anime was uploaded online on the "Manga Park" app by Mosae Nohara (野原もさえ).
Humanoid Monster BEM ReturnsEdit
A manga by Naoto Tsushima (津島 直人) serialized in Monthly Shonen Gangan magazine from December 1993 to July 1995 for 20 chapters.