By Alix Nathan. 4 Extra Debut. Fireman Gwyn discovers more than he envisaged when he investigates a suspicious fire on a Welsh farm. Show more

By Neil Hartman and Tony Haynes. Attracted to Karlssen's brilliance, Chapman discovers he is on the receiving end of his dark ambition. Show more

By Rachel Trezise: Christmas '83 in the Valleys. Ceri wants to give her two children toys, but their father has other plans. Show more