Liliane Brousse is dubbed by Christine Finn.

Another version of Josephine Tey's novel "Brat Farrar" had appeared on Hammer's schedule as far back as 1952.

The film was released as a double bill with The Kiss of the Vampire (1963).

The film takes place in 1961.

At 20:09 estate administrator Kossett tells Simon Ashby that Ashby will likely "Drink yourself to death...". This is prophetic as the actor portraying Simon Ashby, Oliver Reed, had a fatal heart attack in 1999 at the age of 61 due to his severe alcoholism.

Antony James Ashby was born in 1938 and died in 1953.

John and Mary Ashby were killed in a plane crash in 1950.