The film was produced and directed by William Castle.

William Castle added a gimmick to most of his films over the next ten years.

William Castle initially purchased the film rights and asked author Ludlum to write the script.

At the film's end, the voice of William Castle is heard throughout the theater, requesting that the audience not reveal the unexpected ending to others.

It is a remake of the 1960 film 13 Ghosts by William Castle.

I am William Castle, the director of the motion picture you are about to see.

The local water-tower was named after him: William Castle.

Uranium Boom is a 1956 American film directed by William Castle.

In the late 1950s, William Castle became known as the great innovator of the B movie publicity gimmick.

May 31 - William Castle, American film director (b. 1914)