A 200-year-old gaol has been brought back to life for the filming of a new supernatural TV series.

Ruthin Gaol is the location for The Irregulars, a new series by streaming giant Netflix set in Victorian London that follows a gang of troubled delinquent teens who are manipulated into solving crimes for the sinister Doctor Watson and his mysterious business partner.

As the crimes take on a horrifying supernatural edge and a dark power emerges, it is up to the Irregulars to come together to save London, each other, and potentially the entire world.

The series stars the likes of Thaddea Graham, from Letter For The King; Darci Shaw from Judy and The Bay; and Jojo Macari, Sex Education.

A spokesperson for Denbighshire Archives, which is based at the gaol, said its staff had been “busy behind the scenes” during the filming.

Denbighshire County Council said it hopes the filming will “boost the local economy” by raising awareness of the Vale of Clwyd town.

“We are delighted to be working with the film company,” a Denbighshire County Council spokesperson said.

“Ruthin Gaol is an iconic building and we are not surprised that it has attracted the attention of film producers, as we have seen a number of programmes filmed there over the years.

“We are hoping that having the production team working and based in Ruthin and surrounding area will provide a boost to the local economy in the short term, as well having added benefits when the programme is aired.

“We will eagerly wait to see the finished product.”