Celebrity investigators Jimmy Carr, Alison Hammond and Amanda Holden try to help a team of two contestants tell the difference between good and bad mystery singers without ever hearing them sing a note. With £10,000 on the line, the contestants attempt to weed out the bad singers, based on a series of clues, interrogation and lip sync performances. The last mystery singer standing then reveals if they are a good or a bad singer in a duet with musical guest star Becky Hill, resulting in either a magical musical moment or a comedy collaboration on her hit Wish You Well! If the contestants successfully identify a good singer, they win the money, but if a bad singer managed to fake it all the way to the end, they steal the £10,000!In this episode, married couple Heather and Kaveh from Edinburgh are hoping to win the £10,000 to treat their mums to a spa day they won't forget. But with the line-up of imposters including a psychologist, a tour guide and a theatre manager, they may have their work cut out!