[1] The screenplay was co-written by Martucci and Buricchi, based on a story by Luciana Anna Spacca.

[1] The film was aimed at foreign markets which led to its producer Pino Buricchi putting director Lucio Fulci's name in the credits initially as special effects supervisor.

Believe me, when you read somebody's quote on a movie poster, think of how easy it is for a press agent to earn a living.

[1] It was quickly released on VHS in Italy through the Playtime label with text stating "Un film di Lucio Fulci" (transl.

[6][7] Fulci threatened to sue which led to a sticker being added to each video sleeve's cover that properly credited Martucci as the director.