Inspector Neumann is the Prague police inspector investigating the apparent vampire murder. Unlike Dr. Doskil and Baron Otto, he initially refuses to accept a supernatural explanation, but he later descends into the ruined castle with Professor Zelin and Baron Otto to hunt the supposed undead attackers.
Local police inspector with artificial arm, ally of Baron Wolf.
Colonel Bishop is Arabella's uncle and a military commander in Port Royal. Suspicious of Peter Blood's plans, he has Jeremy Pitt flogged and interrogated, later becomes governor, and leaves the colony undefended while pursuing Blood. After Blood saves Port Royal, Bishop is arrested and faces judgment from the new governor.
A scientist who initially treats victims but is revealed to be the true culprit. He creates an artificial organism feeding on blood, uses telepathy to control servants, frames Herman Gleib, and attempts to kill Inspector Brettschneider before being shot.
A mad scientist conducting regeneration experiments. After his first subject dies, he flees on a liner that sinks. Stranded on an island, he resurrects a native chief's wife, is worshipped as a god, burns the lifeboat, and plans to use the remaining survivors for further experiments.
Robert is Irene's father and the owner of the rural German manor where the birthday gathering and blue-room murders unfold. He knows the room's history, including the deaths of his sister and best friend, and privately tells Commissioner Forster that The Stranger is his brother and Irene's biological father.
Ivan Igor is a sculptor who operates wax museums in London and later New York. After Worth burns his first museum and leaves him injured, Igor becomes wheelchair-dependent and secretly creates figures from murdered victims. He is the film’s central villain, seeking revenge on Worth and targeting Charlotte because she resembles his favorite subject.
Dr. Paul Rigas is a mad scientist and colleague of Dr. John Lawrence who seeks to create an army of electrobiologically driven zombies. He repeatedly increases Dan McCormick’s electrical exposure, causing mental ruin and dependence, then manipulates his conviction to test the electric chair before ultimately being killed by Dan.
Former teacher turned envious assistant to Ludwig Frankenstein.
Eccentric character involved in espionage and government plots alongside Chan.
Master criminal and Holmes' arch-nemesis, orchestrating complex criminal enterprises.
Local police inspector who arrests Lawrence Talbot and oversees castle investigations.
Lionel Atwill has 79 screen credits in a career dating back to 1918. Their work spans 9 cinematic universes — most prominently Frankenstein (Universal) with 3 titles. Signature works include The Mad Doctor of Market Street, Secret of the Blue Room, Mystery of the Wax Museum. Explore the interactive character relationship maps on each title page to trace how their roles connect across franchises.
Universe traveler — spans 9 universes
Related entry on Wikidata (Q575668), public domain (CC0).
