Watch Series: Mystery Diners Released in (2012) - Season 9 produced by USA, The TV Series categorized in Reality-TV, and content rating TV-G with duration 21 min broadcasted as these networks Food Network, Streamed at Putlocker & directed by Peter M. Cohen, David Franzke. What happens in the food world when a bad employee starts to take down an otherwise thriving establishment or when restaurant owners suspect someone of not doing their job appropriately? They call in the Mystery Diners. These undercover operatives go into restaurants, bars and food service establishments with hidden cameras to find out what's really going on when the boss isn't around. - Season 9