Dr. Terror's House of Horrors was a horror film in which Roy Castle acted some time before he played the part of Ian in Dr. Who and the Daleks. (PROSE: Lady Penelope Investigates the stars of the Sensational new film Dr. Who and the Daleks!)
Behind the scenes
In the real world, Dr. Terror's House of Horrors, as well as Roy Castle, also boasted Peter Cushing as part of its main cast.