Porridge

(BBC1, 9.30pm-10pm)

Prison-based comedy from veteran writers Dick Clement and Ian La Frenais, who also penned Ronnie Barker’s highly successful series of the same name aired in the mid-1970s. In this instalment, prison bad boy Dougie Parfitt expects a favour, and the arrival of a new prison officer on the block spells double trouble for Fletch.