DI Sleet and sidekick Richard Osman wade into the art underworld to catch Bjork's killer.
Guest rookie Martin Kemp is tasked with solving the murder of Rita Ora in Victorian Successville.
Reporter Harry Hill is found dead, covered with radiation burns and surrounded with weird footprints.
DI Sleet and his sidekick Reggie Yates try to solve the murder of undercover detective Noel Edmonds.
Professor Green enters Successville amidst an epic rivalry between a supervillain and a masked vigilante superhero.
Sleet faces his toughest decision to date. He must turn his back on one of his personas forever, but will it be Sleet the cop or Sleet the superhero?