Bringing Down the Haus: The owner of a German eatery in Arizona fears his new manager, who happens to be his wife's nephew, is unqualified for the job. (S1 Ep3)
Big Earl's Gone Wild: After losing thousands of dollars in unaccounted alcohol, the owner of Big Earl's Greasy Eats investigates rumours of unauthorised late-night staff parties. (S1 Ep4)
F for Effort: While investigating a Phoenix eatery, the Mystery Diners encounter several problem employees who threaten patrons, drink on the job and eat customers' food. (S1 Ep5)
Managing Disaster: The owner of an Italian bistro is concerned that his manager is picking favourites based on appearance. The Mystery Diners go undercover to investigate. (S1 Ep6)
Employee Discount: Andy believes discrepancies at both his wine shop and restaurant are somehow related. Charles Stiles sends in Mystery Diners Destiney and Rob to investigate. (S8 Ep2)
Poaching Profits: Fearing that someone on his staff is using restaurant supplies to operate a competing catering company, Lenny contacts Charles Stiles for help. (S8 Ep3)
Missing Memorabilia: The owners of Fenders Moto Cafe and Brew Pub call Charles Stiles when they notice some of their valuable motorcycle memorabilia has gone missing. (S8 Ep4)
Robbed Kabobs: After noticing a discrepancy in supplies, the owners of Dar Salam fear a new Iraqi food cart that's competing with their restaurant is related to the problem. (S8 Ep5)
Behind the Eight Ball: Kent, owner of Uptown Billiards in Portland, believes the social media expert he hired to promote his restaurant isn't doing an adequate job. (S8 Ep6)
Food Cart Catastrophe: When the owners of A La Carts Food Pavilion in Portland hear complaints from their tenants about the new manager, they contact Charles Stiles to investigate. (S8 Ep7)
Local Celebrities: Fearing the staff's getting carried away with the digital shorts they produce to promote the restaurant, the owners of Amalfi's contact Charles Stiles for help. (S8 Ep8)
Thanksgiving Thievery: Kristian, owner of Tavern on Main, fears someone on his staff is stealing donations from his restaurant's annual Thanksgiving Food Drive. (S8 Ep1)
Daddy's Girl: When Joe and Fran hear customer complaints about stolen items, Joe suspects their daughter's boyfriend is to blame. Enter Mystery Diners to find the thief. (S7 Ep13)
Cafe Coup: After purchasing Cafe Aldente, the new owners believe their employees are still practising old policies. Charles is called to find out if anyone is ignoring the new rules. (S7 Ep12)
Vintage Scams: Jimmy is concerned about a dip in sales, especially during his vintage car show. Charles sends in Mystery Diners who discover that his staff are breaking multiple rules. (S7 Ep10)
Vicious Cycle: After noticing a decrease in sales, Slice Works asks Charles to investigate its bicycle delivery service. Mystery Diners discover one delivery guy is doing two jobs at once. (S7 Ep8)
Heavy Metal Mess: The Toad Tavern owners need to know if their son's band is more focused on their other aspirations. Enter Mystery Diners who find another employee may be ripping them off. (S7 Ep7)
Customer Concerns: Fearing that his regular customers have become too entitled, Larry asks Charles Stiles to investigate. He discovers that an employee may be creating the problem. (S7 Ep6)
Trademark Trouble: After already battling one fast food chain over the rights to his sandwich, the owner of Devine Pastabilities now fears someone from within is trying to steal his creation. (S7 Ep5)
Catering on the Side: Concerned over a large loss in food and supplies, the owner of a restaurant in Arizona uses undercover surveillance to spy on a recently hired chef. (S1 Ep2)
Raiding the Bar: A pub owner in LA uses undercover surveillance to spy on one of her employees, who she suspects is over-pouring for customers and over-tipping himself. (S1 Ep1)
Tables Turned: Charles Stiles and his undercover team risk it all to bust the boss. The sting is conducted from inside the restaurant to see if the accusations against the boss are true. (S11 Ep13)
Rigged Rental: Steve, owner of Nashville Street Tacos and The Stillery, believes somebody is using his apartment above his restaurant while he's out of town. The Mystery Diners investigate. (S11 Ep12)
Duelling Food Trucks: Marko and Brett own competing food trucks in San Diego, but have put aside their differences to investigate revenue loss in both of their vehicles. (S7 Ep4)
Promotion Sabotage: When Isabel and Todd feud over which waiter to promote, they ask Charles to mediate. Mystery Diners discover one of the candidates is being sabotaged from within. (S7 Ep3)
Cocktail Fail: Fearing that her bartenders' rivalry is the cause of missing alcohol, Sarra asks Charles Stiles to investigate. Mystery Diners go undercover to find out who's the culprit. (S7 Ep2)
Going to the Dogs: After noticing depleting supplies, the owners of Shades Oceanfront Bistro ask the team to go undercover. They discover one employee's running their own side business. (S7 Ep1)
Dinner Drama: The owner of Encore Dinner Theatre calls in Charles Stiles and his team. The Mystery Diners investigate if a relationship involving a waiter and an actress is creating drama. (S5 Ep13)
Cover Charge: Charles and his team go behind the scenes at Red Balls Rock-and-Roll Pizza in Moorpark, California, to investigate inventory discrepancies. (S5 Ep12)
Coupon Coup: A rise in coupon use worries the owner of a California restaurant, who discovers, with help from Charles Stiles, that he has good reason to be suspicious of his staff. (S5 Ep11)
Paranormal Activities: The owner of Taverna Mazi in Seattle wants Charles to look into rumours that members of his staff are offering haunted tours of the restaurant. (S5 Ep10)
Mascot Mayhem: Rumours of a misbehaving restaurant mascot are investigated when Charles Stiles and his team visit Zippy's Giant Burgers in Seattle. (S5 Ep9)
The Great Divide: After inheriting staff, the new owners of Sam's Tavern believe there's a divide between the old and new employees. Charles discovers who's responsible for the rift. (S5 Ep8)
Crooked Contest: After hearing rumours that their songwriting contest is rigged, Rose and Tom of Belcourt Taps contact the Mystery Diners. Tiffany goes undercover to investigate. (S11 Ep11)
Hot Meat: Tony, owner of the Rivoli's, believes his new meat purveyor is selling him stolen goods. Charles sends in a Mystery Diner, who has trouble infiltrating the staff. (S11 Ep10)
Lobster Looting: Brother-sister owners have noticed a discrepancy in their lobster supply at Langosta Lounge. With the help of Charles Stiles, they'll discover where the lobsters are going. (S11 Ep9)
Venue Vandals: Concerned about vandalism, the owner of the Spanish Potato Grill reaches out to Mystery Diners. The team learn that the restaurant is being sabotaged from the inside. (S11 Ep8)
Oktobertheft: The co-owner of Speisekammer, a German restaurant in Alameda, California, worries that the 'dirndl girls' hired by her ex-husband are more trouble than they're worth. (S5 Ep5)
Money on the Side: The owner of Rocco's Cafe in San Francisco calls the Mystery Diners crew when he hears rumours that there are unauthorised promos being given by his new manager. (S5 Ep3)
Tastes Like Chicken: After hearing rumours that customers are being served meat at his vegan restaurant, Mitch, owner of Source contacts Charles Stiles for help. (S5 Ep2)
Fired Up: The owner of Looney's BBQ calls the Mystery Diners crew to investigate if his staff is pranking their customers with extremely hot sauce. (S5 Ep1)
Three's a Crowd: Marvin contacts Charles to help investigate an ongoing feud between his girlfriend/manager and best friend/customer. Mystery Diners go undercover. (S4 Ep12)
What a Drag: After hearing complaints from his cross-dressing customers that the weekly quiz night is rigged, Bob, owner of Venture Inn, suspects his manager is responsible. (S4 Ep11)
Security Issues: After hearing complaints that their late night security guard is being too rough with customers, Dave and Mike Frank contact the Mystery Diners for help. (S4 Ep10)
Vicious Valets: After hearing complaints about her valet service, the owner of Breuckelen Colony contacts the Mystery Diners for help. They discover an unauthorised car washing service. (S11 Ep7)
Comic Book Caper: Vlane, owner of Action Burger, contacts Mystery Diners to investigate missing comic books at his comic-themed restaurant, to find an employee abusing their powers for evil. (S11 Ep6)
Unhappy Holidays: Nirav, owner of Smokin' Barrel, contacts Charles Stiles after noticing a decline in sales every holiday season. The Mystery Diners discover a suspicious sidewalk solicitor. (S11 Ep5)
Secondhand Scam: Luca asks Charles for help after his customers find food inside the factory-sealed appliances they just purchased. Mystery Diner Jamie discovers a large-scale operation. (S11 Ep4)
Throw Mumma from the Restaurant: When Tommy, owner of Gigi Restaurant, suspects that his mother/manager is discriminating against younger customers, he contacts Charles to investigate. (S4 Ep9)
Deliver Us from Evil: After receiving numerous complaints about his delivery service, Danny, the owner of Bella Luna Cafe, contacts Charles for help. Mystery diner Mark goes undercover. (S4 Ep8)
Lactose Intolerant: After learning that several petite women have easily completed their grilled cheese eating challenge, restaurant owner Chris contacts Mystery Diners to investigate. (S4 Ep7)
Wine on Wheels: Gary and Tony contact Charles after hearing rumours that employees are illegally selling alcohol to customers at their BYOB restaurant. (S4 Ep6)
Too Many Cooks: After receiving numerous complaints about his new executive chef, Pascal, the owner of Bistro Bordeaux in Evanston contacts Charles to investigate. (S4 Ep5)
While the Cat's Away: While recovering in Brazil from a paragliding accident, Kevin, owner of Gauchos Village in Glendale, notices a discrepancy in revenue and inventory at his restaurant. (S4 Ep4)
Employee of the Month: When a lack of employee harmony threatens his restaurant, Vic, owner of Colombo's Italian Steakhouse in Eagle Rock, contacts Charles for help. (S4 Ep3)
Chef's Choice: Patrick, owner of Buster's Beach House in Long Beach, calls Charles to investigate rumours that his executive chef is showing preferential treatment amongst the waiting staff. (S4 Ep1)