Fox and Gordon Ramsay are collaborating on another food-based unscripted series — the seventh one on the network’s roster, if you’re counting.

The new series, which premieres May 21, is called Gordon Ramsay’s Secret Service. It’s a twist on the Kitchen Nightmares formula in which Ramsay comes to the aid of a struggling restaurant (while also pointing out all the wrong and gross things going on in the kitchen) — but instead of going through the front door, Ramsay will first go in covertly.

Here’s how Fox describes the show: “With the help of a secret source on the inside, he’ll gather raw, unfiltered evidence and get a 360-degree view of the major issues facing each restaurant. This insider will not only remain a secret to the staff, but will also help Ramsay infiltrate the restaurant after-hours for a dramatic nighttime black light kitchen investigation that reveals...