Mitchell B. Modell, CEO of Modell's Sporting Goods, gets some major league advice from New York Yankee's pitcher CC Sabathia before beginning his undercover mission. Also, a discontent employee confronts the CEO when suspicions swell about his true identity, and shocking news from the boss causes one employee to collapse.

When Ron Lynch, President of Tilted Kilt, a Celtic-themed sports bar and restaurant, goes undercover in his own company, he discovers one Kilt Girl crossing the line with customers. Also, one employee struggles to keep a brave face during unbearable personal circumstances, and the pressure heats up when the boss struggles to keep up in the kitchen.

Former Hooter employee, Kat Cole, President of Cinnabon, Inc., visits her former boss, Coby Brooks (featured on the "Hooters" episode), to ask advice before beginning her undercover mission. While undercover in a Cinnabon micro-bakery, one customer nearly blows her cover by asking questions about the cameras. Meanwhile, as our youngest boss featured in the series at age 34, Cole discovers a couple of employees who share her zealous work ethic.

Diamond Resorts International CEO Stephen J. Cloobeck takes a look at their recent acquisition, Pacific Monarch Resorts.

Steve Greenbaum, CEO and Co-Founder of PostNet, the fastest-growing design, printing, copying and shipping franchise, dons a drastic disguise for his undercover mission, where he meets a former Marine working as a packing specialist while adjusting to civilian life. Also, he encounters a family that is struggling to keep their franchise alive, and another franchise owner who vents about failed marketing attempts.

Lorne Abony, CEO and Chairman of Mood Media, a leading in-store media specialist that uses a mix of music, visual and scent media to help its clients communicate with consumers, faces his fear of heights when he has to climb a tall ladder to install equipment during his undercover mission. He also gets a lesson in using a soldering iron.

Jim Rogers, Chairman and CEO of Kampgrounds of America Inc., the world's largest system of family friendly franchised and company-owned campgrounds, with 486 locations throughout North America, faces his fears when he must zipline while undercover at a KOA site. The active Eagle Scout witnesses a staff member confronted with a difficult guest and later learns to operate a tractor to dig up an infested tree.

Paul Damico, President of Moe's Southwest Grill, has to bite his tongue after realizing one of his restaurant supervisors is being pushy and rude to the line workers. Later, Damico works with a catering director who goes out of her way to bring in new business for the company.

Sara Bittorf, Chief Brand Officer of Boston Market, goes undercover and struggles when taking orders, struggles to manage a busy, timed drive-thru window, is a bit slow when tasked with carving whole roasted chickens and makes the crucial decision to terminate an employee after he makes disparaging comments about the customers.

Toby Bost, CEO of O'Neill Clothing, USA, one of the largest surf wear and active lifestyle brands, is put in a difficult position when an employee's casual attitude crosses the line. Also, a stockroom worker encourages Bost to join him in doing pushups as a penalty, on Undercover Boss.

Andy Wirth, President and CEO of Squaw Valley and Alpine Meadows, two ski resorts located in Lake Tahoe, ventures to the top of an unsafe cliff to post warning signs while training with a ski patrol. Olympic Gold Medalist Jonny Moseley joins Wirth in a ruse to help protect his true identity in the small ski town.

Andy Wiederhorn, CEO of Fatburger, a "fast casual" restaurant famous for their made-to-order burgers, goes on an undercover journey.

When ADT Chief Marketing and Customer Officer Tony Wells goes under cover, he struggles to make a sale and deals with a life-or-passing situation when answering a call.

When Eric Casaburi, CEO of Retro Fitness, a franchised full service fitness center, discovers an employee who hates customers and fails to follow directions, it leads to one of the biggest reveals ever on Undercover Boss. Also, Casaburi works with an employee who credits Retro Fitness for a major lifestyle change

John Wilson, President and Chief Operating Officer of Rollins, Inc., the parent company for Orkin, North America's largest pest control provider, cleans up a major cockroach infestation and tackles swarming bees.

Some of the most intriguing employees from the show's four seasons are featured. The hour examines how the "Undercover Boss" experience impacted their lives and reveals where they are now.

This special episode of Undercover Boss features updates on some of the most compelling bosses and how the undercover experience impacted them personally as well as the companies they lead. The bosses include the Diamond Resorts International CEO who created a crisis fund that saved an employee's life and the Kendall-Jackson Wine Estates President who has eased communication barriers among his workforce. Also, see where the Hooters CEO is now after experiencing one of the most shocking moments on the series and the Modell's Sporting Goods CEO's physical transformation.