Concerned over a large loss in food and supplies, the owner of a restaurant in Gilbert uses undercover surveillance to spy on the chef, who is suspected of stealing from the restaurant.

The owner of a German eatery in Glendale, Arizona, fears his new restaurant manager, who happens to be his wife's nephew, is unqualified for the job, so the Mystery Diners go undercover to find out.

After losing thousands of dollars in unaccounted alcohol, the owner of Big Earl's Greasy Eats in Cave Creek, Arizona, investigates rumours of unauthorised late-night staff parties at the restaurant.

While investigating a Phoenix eatery, the Mystery Diners encounter several problem employees who threaten patrons, drink on the job and eat customers' food.

The owner of an Italian bistro is concerned that his manager is acting inappropriately with the staff, picking favourites based on appearance. The Mystery Diners go undercover to investigate.

A chef with a bad attitude is investigated by the Mystery Diners.