John Carradine
Narrator / Host
Acting
Elke Sommer
Herself
Acting
William Peter Blatty
Himself
Writing
Susan Strasberg
Herself
Acting
Frank De Felitta
Himself
Writing
Arthur Conan Doyle
Himself (archive footage)
Writing
Robert Bloch
Himself (uncredited)
Writing
Elliot Geisinger
Self
Production