Restaurant owners call a company, called "mystery diners", when/if they are suspicious about their employees. Sometimes they steal or treat customers badly etc... The company will set up surveillance cameras and use actors to help find evidence that the employees are doing these things, sometimes leading to them getting suspended, fired or sued.
Did You Know?
In the episode "Greek Tragedy" the restaurant " My Greek Italian Restaurant is located at 2303 N Pearl St. Tacoma, WA 98406. The building is a former "Shari's" Restaurant which is a franchise here in the Northwest that uses the same architectural features throughout the chain of locations. The Greek Restaurant has closed since the filming but the building remains standing. See more