Last modified on Sat 3 Jul 2021 01.18 EDT Beck 9pm, BBC Four The eternally-popular Swedish crime series based on the detective novels by Maj Sjöwall and Per Wahlöö returns for an eighth outing, featuring four new feature-length episodes. Our eponymous detective Martin Beck (Peter Haber) has been promoted to police chief and begins his new role with the gruesome case of a murdered boy in this opening episode. As his team investigates the death, they are led to a narcotics network, which they are unaware is already being investigated by an undercover team. Ammar Kalia 8.30am, ITV As they ha...