Looking as though it was lit entirely by a single spotlight, and boasting some truly terrible acting and direction, The Dungeon (AKA Dr. Jekyll’s Dungeon of Death) is an unbelievably bad horror movie that manages to throw in some very poor martial arts for good measure.
The great grandson of the original Dr. Jeckyll (a very hammy James Mathers) is experimenting on kidnap victims in an attempt to perfect the aggression serum first created by his famous ancestor. Jeckyll injects his prisoners with his serum and films their fights to the death; he is aided in his task by a black hunchback-style assistant named Boris and his lobotomised sister Hilda.
The mad scientist spends the rest of his spare time trying to seduce Julia, the object of his desires (well, most of them, since he also has a thing for his sister!). Julia is somehow resisting his charms, so Jeckyll wisely keeps her tied up and drugged in his house.
When the father of Julia pays a visit (believing his daughter to have died in a riding accident), the mad scientist tries to enlist his help. Naturally, he isn’t too keen on the idea and tries to put a stop to the madness.
Although this premise actually sounds fairly entertaining, let me assure you that not one facet of this awful production is worthy of praise: the whole film is extremely dark (ie., too shadowy); the script is terrible; the acting is amateurish in the extreme; and the endless fight scenes are interminably boring.