Freddie Francis replaced Don Sharp as director at the last minute.Allan Bryce (ed.), Amicus: The Studio That Dripped Blood, Stray Cat Publishing, 2000, p. 93 Francis later said "If you like horror films, that was good, it was a good film, and Peter Cushing was excellent in it as he always is. It was Such an unlikely story and Peter Cushing seemed to convince everybody it was real. Even I, I listened to Peter talking all this rubbish on the screen and I think that must be true. Peter was very good, and Peter is the greatest guy at speaking unbelievable dialogue and making you believe it."
