Co-star Gaby André was French and spoke English with a pronounced French accent. All of her dialogue was dubbed over by an actress with a British accent.
On its original theatrical release, it was notably unsuccessful at the box office; it became something of a cult film due to later television syndication.
According to Leonard Maltin, it was Britain's only Giant Bug movie.
Several plot elements of this low-budget film appear to have been inspired by 20th Century Fox's The Day the Earth Stood Still (1951).
The film was distributed in the UK by Eros Films. In 1958 it was released in the US by Distributors Corporation of America on a double bill with The Crawling Eye (1958) (as The Crawling Eye) (allegedly, DCA considered the alternative titles The Crawling Terror and The Crawling Horror for the second feature).