Charles Stiles and the Mystery Diners descend upon The Blue Moose, where longtime chef "Grumpy Tom" has a knack for disrespecting everyone in the place, including the newly installed second-generation owner. Mystery Diner Jessica goes undercover as a waitress to prove just how grumpy Tom is and how his attitude negatively affects business.
After discovering discrepancies in their chicken and beef supply, which they serve to both their human and canine customers, the co-owners of Shades Oceanfront Bistro in San Diego contact Charles Stiles for help. Mystery Diners Corinne and Seth go undercover and discover one of the employees is running their own side business.
After noticing lackluster dinner sales and a dip in bottle service, Freddy and Abdi of Supperclub in Los Angeles contact Charles Stiles for help. When he sends in Mystery Diners Eliot and Felicia, they discover the staff is using a street vendor to line their pockets.
After noticing missing food and merchandise, Shauna and Joe, owners of Epic Rollertainment in Murrieta, Calif., contact Charles Stiles for help. Mystery Diners Kendall and Eliot discover an ever bigger problem when the roller rink closes at night.
Mystery Diners counts down the top ten love-related scams that broke hearts and the bank.
After receiving numerous complaints about his delivery service, Danny, the owner of Bella Luna Cafe in Chicago, contacts Charles for help. Mystery Diner Mark goes undercover and discovers both delivery drivers are taking advantage of the restaurant -- and customers.
Michell and Bella, owners of Latin House in Miami, fear someone at their offsite warehouse is giving away the recipes to their award-winning burgers. Charles Stiles sends in Jamie and Estefanie to find out if there are any moles inside their organization.
After hearing complaints about rowdy customers, Bryan, owner of Corbin Bowling Center in Tarzana, Calif., contacts Charles Stiles for help. Mystery Diners Eliot and Kendall go undercover and discover the staff is condoning reckless behavior.
After noticing that several bottles of expensive wine have gone missing, Michael, owner of Bistro Baffi, in Burien, Wash., contacts Charles for help. Mystery Diners Allison, Julie and Benny go undercover and discover someone in the staff is taking much more than a paycheck.
Keith, the owner of Deanie's Seafood in New Orleans, is concerned that his manager is more focused on his amateur comedy career than managing the restaurant. Charles sends in Mystery Diners Andrew and Deanna who discover that another employee may be taking advantage of the situation.
After a feud between his pizzeria and bakery threatens his business, John, owner of Metro Pizza in Las Vegas, contacts Charles Stiles for help. Mystery Diners Andy and Arielle go undercover and discover the source of the tension.
When Lee, owner of Old Vinings Inn in Atlanta, hears rumors of unauthorized "Civil War Tours" taking place inside his historical restaurant, he contacts Charles Stiles to investigate. Mystery Diners Kendall and Eliot go undercover to see how authentic the tours really are.
Fearing that a rivalry between her two flair bartenders is the cause of tension and missing alcohol, Sarra, owner of The Compass in Carlsbad, Calif., asks Charles Stiles to investigate. Mystery Diners Amanda and Chelsea go undercover to find out who's the real culprit.
After inheriting some of their staff from the previous owner, James and Briana, the new owners of Sam's Tavern in Seattle, believe there is a divide between the old guard and their new employees. Charles sends in Mystery Diners Nadine and Jason to discover who's responsible for the rift.
Sonny and Sage, owners of Hot Red Bus near Los Angeles, contact Charles Stiles after hearing rumors that their restaurant is open on the one day it's supposed to be closed. Mystery Diner Kendall goes undercover to see what's going on when the doors are locked.
Mystery Diners counts down the series' greatest moments catching employee theft, involving stolen food, alcohol, supplies and money.
Mystery Diners counts down the craziest schemes caught on video, from operating unauthorized businesses, raising money for bogus charities, and even creating fake employees to collect extra paychecks.
After hearing complaints from his cross-dressing customers that the weekly quiz night is rigged, Bob, the owner of Venture Inn in Philadelphia, suspects his manager is responsible. Charles sends in Mystery Dinner, Danny, who goes undercover as a drag queen to infiltrate the trivia competition.
After hearing multiple complaints about nonmembers attending members-only dinner events, Madeleine, general manager of Hawaii Yacht Club in Honolulu, calls Charles Stiles for help. Mystery Diners Kylie and Jamie go undercover to discover which employees are sneaking in their friends.
Uche, owner of The Anchor Bar and Tattoo in Atlanta, contacts Charles Stiles after noticing a drop in food and tattoo sales. Mystery Diners Meagen and Justin go undercover to see if the two problems are related.
Fearing that his regular customers have become too entitled, Larry, owner of 730 South in Denver, asks Charles Stiles to investigate. Mystery Diners Ariel and Conner go undercover and discover an employee may be creating the problem.
Vlane, the owner of Action Burger in Brooklyn, contacts Mystery Diners to investigate missing comic books at his comic book-themed restaurant. Charles Stiles sends in Jamie, who discovers an employee abusing their powers for evil.
Fearing that her employees are selling the secret recipes to her raw food menu, Sylvia, owner of Beets Cafe in Austin, contacts Charles Stiles for help. Mystery Diners Holly and Robin go undercover and discover an even bigger problem.
Tired of being mistreated, the wait staff of a California restaurant contacts Charles Stiles to do a reverse sting on their employer. Mystery Diners Amanda and Eliot go undercover and uncover what's really going on inside the kitchen.
After noticing an unusual increase in coupons, Aaron, owner of The Hangout in California, calls Charles to investigate. Mystery Diners Shelby and Kiel go undercover and discover the wait staff is taking advantage of their situation.
After noticing discrepancies in sales, Allen, owner of ShoreFyre in Honolulu, contacts Charles Stiles to investigate. Mystery Diners Jordan and David go undercover and discover a related problem with the surf shop next door.