Just now Amy MackrillBBC Wales Sky Sky's latest thriller, Prisoner, was largely filmed in Wales - including this scene in the Butetown Tunnel in Cardiff Towns and cities across Wales have formed the set of a new action thriller TV series. Prisoner, starring Izuka Hoyle and Tahar Rahim, tells the story of a former hitman who leaves his safe house in St Davids, Pembrokeshire, before his convoy is attacked by a drone and gunmen.