When a restaurant owner suspects employees of not doing their jobs — whether it be stealing, lying, mistreating customers or generally doing lousy work — they call in the Mystery Diners. These Mystery Diners are undercover operatives who go into restaurants, bars and food service establishments with hidden cameras to perform surveillance to find out what's really going on when the boss isn't around.
This list is in constant development according to highly rated and reviewed TV shows that I've happened to miss (I was potentially under a rock somewhere). Also, includes up and coming shows that could be firm favourites.