Comedy: Lethal Weapon, 9pm, ITV

Back for a second series, Clayne Crawford and Damon Wayans (right) return as unlikely crime-fighting duo Martin Riggs and Roger Murtaugh. In the opening instalment, Murtaugh follows Riggs down to Mexico, where the plan is to avenge his wife’s death and finish off Tito Flores once and for all. Once back in the US, they have a few people to answer to during the ongoing investigation around Flores, including Murtaugh’s family.