Characters played by Boris Karloff
Nahum Witley
Characters played by Nick Adams
Stephen Reinhart
Characters played by Freda Jackson
Letitia Witley
Characters played by Suzan Farmer
Susan Witley
Characters played by Terence de Marney
Merwyn
Characters played by Patrick Magee
Dr. Henderson
Characters played by Paul Farrell
Jason
Characters played by Leslie Dwyer
Potter
Characters played by Harold Goodwin
Taxi Driver (UK version)
Characters played by Sydney Bromley
Pierce
Characters played by Billy Milton
Henry
Characters played by Sheila Raynor
Miss Bailey (UK version)
Characters played by Gretchen Franklin
Miss Bailey
Characters played by George Moon
Taxi Driver