The Beast in Heat (1977)

In a remote village in occupied Europe, the SS pursue their inhuman treatment of captured partisans in efforts to force them to betray their comrades.... while Fraulein Krast, a sadistic biologist, concentrates her efforts on the womenfolk with refined tortures and humiliation, leaving them to the mercy of a sex-crazed half-man, half-beast she has created with experimental injections.... And as advancing Allied forces approach the village, Krast herself becomes a victim of her own fiendish rituals....

The Beast in Heat was on the official UK video nasties list. No UK re-release.