Credit: BBC/Severn Screen/Warren Orchard More Hidden for fans to enjoy Hidden, the hit psychological crime drama, will return for a third series on the BBC. The BBC announced that it will be back for a third run, with Sian Reese-Williams returning as DCI Cadi John. Also back is Siôn Alun Davies as DS Owen Vaughan. The first two series are still available to watch on iPlayer and have been seen by nearly 10 million viewers in the last year. It airs as Craith on S4C. BBC Cymru Wales Head of Commissioning Nick Andrews says: “Hidden has been a superb returning series for BBC Wales and fans of Cadi and co. will be thrilled that she’s back doing her thing.