Lon Chaney Jr.
as Groton
Angelo Rossitto
as Grazbo the Evil Dwarf
Russ Tamblyn
as Rico
J. Naish
as Dr. Frankenstein aka Dr. Durea
Zandor Vorkov
as Count Dracula
Anthony Eisley
as Mike Howard
Regina Carrol
as Judith Fontaine
Jim Davis
as Police Sgt. Martin
Greydon Clark
as Strange
John Bloom
as Frankenstein's Monster