Their aim is to discover what's not working in the business. But whilst they’re rooting out problems, they’re also looking to find and reward hidden talent among their employees.
In this series, chief executive Simon Kossoff goes undercover as his restaurant chain Carluccio's plans to double in size in five years. He's keen to expose problems that could jeopardise successful growth. Also featured are the CEO of Oxfam Mark Goldring and the senior director of the world's largest and oldest youth charity - the YMCA - to see how massive budget cuts have affected facilities, staff and residents.
Each episode of Undercover Boss contains unexpected revelations and emotional scenes as the covert employers discover the truth about their organisations, their staff, and what really goes on behind closed doors.
Catch series 6 of Undercover Boss from Friday, 3 April at 21:00 on BBC Knowledge, channel 184 on DStv.