Undercover Boss is a British reality television series. Each episode follows a person in a high management position at a major business who poses as an entry-level employee to find faults in the company. The first series, consisting of two episodes, aired in 2009; the second series, with six episodes, aired one year later. This original series sparked the Undercover Boss franchise. Localised versions have been produced in the United States, France, Australia, Germany, Canada and various other countries. In June 2021, it was announced that it would be revived on ITV after a seven-year absence. Retitled Undercover Big Boss, it premiered on 5 August 2021, with four episodes.