In this episode, DI Sleet is joined by Dragons' Den star Deborah Meaden. Our detectives head up to Lady Gaga's mansion to deal with a minor complaint. While they are there, Lady Gaga is poisoned - it looks like the detectives have a good old-fashioned murder mystery on their hands, with all the suspects under one roof.It's clear from the start that Sleet and Meaden are not going to be the easiest of bedfellows, but can they put their differing professional styles aside for long enough to solve the case? The suspects they meet at the Grange are:Lady Cheryl Fernandez-Versini - Lady Gaga's gorgeous niece who lives at the Grange. Did she have something to gain from Gaga's death?
Boris Johnson - the retired scoutmaster who was in love with Lady Gaga, but did his unrequited amorous feelings lead him to murder?
Nicki Minaj - the invalid aunt who lives in the basement, who clearly hated Lady Gaga, but is she sane enough to have killer her?
Jay Z - the suspicious butler. As in all classic murder mysteries, the butler should always be under suspicion.Having met all the suspects, Sleet gathers all the houseguests in one room to sum up the case. Meaden must decide who killed Lady Gaga, and as ever in Successville, it's a matter of life and death. Have you been paying attention? Did you spot enough clues to work out who the killer was?