Murder in Successville (2015)

DI Sleet brings a different real celebrity into a town populated by comic impersonations, leaving the guest to react to the investigation without a normal script. Murder in Successville takes the awkward-collaboration pleasure somewhere deliberately ridiculous. Choose it if Oliver's theatrical instincts are a stronger draw than strict procedural logic. This is an improvised British comedy format with a mystery to solve, not a conventional serial drama or a documentary about celebrities.