I have watched a few episodes of Undercover Boss and I am very suspicious of the show. The basic premise of the show is that the CEO goes undercover as an entry-level worker on the front lines of the job to see how it is run.
Some people have expressed skepticism over how genuine it is since the undercover CEO walks around with camera crew, which would make workers suspicious. However, the show explains this by claiming that the workers are all told that the cameras are there because they are recording for a show about an entry-level worker.
The main issue that I have with this show is that every single worker you see happens to be a saint and they always seem to work hard and then right on cue they always tell a sob story about how tough their life is. Then predictably at the end these poor workers are rewarded for their hard work by the kind CEO. Is it just a coincidence that just about every single worker the CEO comes into contact with has a sob story? I think that many of the workers who come into contact with the undercover CEO actually know that he or she is the CEO and they pitch their sob story with the hope of striking it rich. Another explanation is that the show is rigged and the undercover CEO is led towards workers who are filtered initially to make sure they have an interesting sob story.
Further Reading: Undercover Boss is the Most Rigged Reality Show I Have Ever Seen (WrestleZone Forums)