TV tonight: Gordon Ramsay goes undercover in a brutal new series

The chef uses surveillance to find out which restaurants desperately need his help. Plus: the search for the truth in The Copenhagen Test. Here’s what to watch this evening

10pm, Channel 4
In a series first shown in the US last year, chef Ramsay is back with his brand of brutal home truths on how to save struggling restaurants. This time, he is using surveillance to secretly gather intel on what’s going wrong before bulldozing in. He starts at a family-run Greek place in Washington DC, where the hygiene standards are said to be seriously lacking. Hollie Richardson