Date Aired Mystery Diners Episodes Season 1 20 May 2012 25 May 2012 01 June 2012 08 June 2012 15 June 2012 22 June 2012 29 June 2012 06 July 2012 Season 2 19 October 2012 26 October 2012 02 November 2012 09 November 2012 16 November 2012 23 November 2012 07 December 2012 14 December 2012 21 December 2012 04 January 2013 11 January 2013 18 January 2013 25 January 2013 Season 3 19 April 2013 26 April 2013 03 May 2013 10 May 2013 17 May 2013 24 May 2013 31 May 2013 07 June 2013 14 June 2013 21 June 2013 28 June 2013 03 July 2013 10 July 2013 Season 4 17 July 2013 24 July 2013 31 July 2013 07 August 2013 14 August 2013 21 August 2013 28 August 2013 04 September 2013 11 September 2013 18 September 2013 25 September 2013 02 October 2013 Season 7 27 Oct 2014 Season 7 27 Oct 2014 Season 7 27 Oct 2014 27 Oct 2014 27 Oct 2014 27 Oct 2014 27 Oct 2014 27 Oct 2014 27 Oct 2014 27 Oct 2014 27 Oct 2014 27 Oct 2014 27 Oct 2014 Season 8 13 Oct 2014 21 Oct 2014 21 Oct 2014 27 Oct 2014 03 Nov 2014 10 Nov 2014 17 Nov 2014 24 Nov 2014 01 Dec 2014 08 Dec 2014 15 Dec 2014 29 Dec 2014 07 Jan 2015 04 February 2015 11 February 2015 18 February 2015 25 February 2015 04 March 2015 11 March 2015 29 April 2015 Season 9 04 Feb 2015 12 Feb 2015 17 Feb 2015 25 Feb 2015 04 Mar 2015 11 Mar 2015 18 Mar 2015 25 Mar 2015 01 Apr 2015 08 Apr 2015 15 Apr 2015 Season 10 28 October 2015 Season 11 02 December 2015 30 December 2015 07 January 2016 20 January 2016 27 January 2016 06 April 2016 21 October 2015 Season 12 04 November 2015 11 November 2015 18 November 2015 25 November 2015 02 December 2015 30 December 2015 13 January 2016. Mystery Diners Jamie and Brianna go undercover and discover a bigger problem inside the dining room. Joining him in the investigation is 1980s pop star Tiffany, who goes undercover as a mystery diner. Mystery Diners Destiney and Grant go undercover to discover what this waiter has up his sleeve. Mystery Diner Jessica goes undercover as a waitress to prove just how grumpy Tom is and how his attitude negatively affects business. He sends in Mystery Diners Patrick and Hal, who uncover a bigger problem inside her kitchen.
Charles sends in Mystery Diner Christine to go undercover as a model to discover who is encouraging the inappropriate behavior. Mystery Diner Shellene goes undercover as a waitress and learns that the manager is serving more than just drinks from the bar. Mystery Diners Jordan and David go undercover and discover a related problem with the surf shop next door. Charles sends in Mystery Diners Amber and Grant and discovers more than one employee is brewing trouble. Mystery Diner Miranda goes undercover and discovers someone is taking advantage of Marvin. When the Mystery Diners go undercover, they discover the manager is doing a lot more than just giving away free steak.
Charles sends in Mystery Diners' Amanda and Rob and discovers that someone is using her charity to line their pockets. This former waiter has threatened a lawsuit, so to appease him, Derrick has made him a host; however, his lazy behavior has not stopped. The Mystery Diners go undercover and discover a bigger problem with a disgruntled waiter who is stealing money and supplies from the restaurant. Season 11, Episode 13 April 20, 2016 Season 11, Episode 13 April 20, 2016 After hearing rumors that their songwriting contest is rigged, the owners of Belcourt Taps in Nashville contact Charles Stiles for help. Charles Stiles sends in Megan and Daniel, who learn the restaurant is being sabotaged from the inside. Charles sends in Mystery Diners Grant and Amber who discover the employees are taking advantage of Kevin's absence.
Charles sends in Mystery Diners' Seth and Corinne, who discover that their employees are turning a friendly competition into an all out war. Mystery Diner Kendall goes undercover to see what's going on when the doors are locked. Mystery Diners Rob, Shellene and Lauren go undercover to find out what smells fishy. Mystery Diners Hollie and Billy go undercover and discover that Hernan's employees have created a game where they mess with blindfolded customers for points. Charles sends in Mystery Diners Shelby and Kiel to see if any employees are taking instead of giving. Charles sends in Joe and Kiara and discovers a bigger problem inside the kitchen.
Derrick contacts Charles for help, and Mystery Diners Shellene, Lukas and Tracey go undercover to see if this coasting host needs to be toast. Mystery Diners Grant and Jill go undercover to see if the waiter is taking his job as seriously as he claims to be taking his classes. Mystery Diners Shelby and Leslie go undercover to find out if any employees are responsible. Charles sends in Jamie and Estefanie to find out if there are any moles inside their organization. Joining him in the investigation is 1980s pop star Tiffany, who goes undercover as a mystery diner. Charles sends in Patrick and Tina to see how the uninvited guests are gaining access. Mystery Diners Kiel and Kendall go undercover to collect fingerprint samples from all the suspects.
Full Show Summary Mystery Diners is an American reality television series on the Food Network. Mystery Diners Shellene and Chris go undercover as a waitress and flirty customer in hopes of scoring invitations to an after-hours bash. The series debuted on May 25, 2012 and focuses on a group of diners who, at certain owners' requests, go undercover at specific restaurants and set up undercover stings and unseen surveillance cameras to catch restaurant employees in the act. The first episode of Mystery Diners was broadcast in April, 2019. Mystery Diners Daniel and Jamie go undercover and discover an unauthorized car washing service.
Charles Stiles sends in Mystery Diner Danny, who has trouble infiltrating the restaurant staff. But wehn he notices a dramatic loss in revenue, he contacts Charles to investigate. Charles sends Mystery Diners Chelsea and Hollie in as customers to see if something smells rotten. Mystery Diners Nicole and Tom go undercover and discover that the manager is hiring her incompetent friends who prevent the restaurant from thriving. Rob and Kiel go undercover to see if the private chef is cooking up trouble.
Mystery Diners Miranda, Denise and Gregg go undercover and discover another problem employee. Mystery Diners' Corinne and Seth go undercover and discover one of the employees is running their own side business. Mystery Diners Kendall and Kiel go undercover and discover the current owner isn't being honest about all of his problems. Charles Stiles sends in Mystery Diners Kiel and Eliot, who uncover a problem with the drive-thru staff. Mystery Diners' Ariel and Conner go undercover and discover an employee may be creating the problem.