The series is based on John Marrs's 2016 novel of the same name.

Netflix gave the production a series order for a first series of eight episodes on 15 November 2018, and the show was created by Howard Overman.

Lois Chimimba, a Scottish actress with a father from Malawi, was cast as Hannah Bailey.

On Rotten Tomatoes the series holds a 39% approval rating based on 18 reviews, with critics saying it has too much plot and not enough resolve despite fun, flashy thrills.

Metacritic gave the series a weighted average score of 51 out of 100 based on 9 reviews, indicating mixed or average reviews.