On A Clear Day is the 1624th episode of The Bill.
PCs Harker and Rickman have a few days off, and they decide to have a holiday in Brighton. Rickman hears that Leroy Jones is back in town, and insists they return to London. She meets Leroy, who insists he is a legitimate businessman now, working for a furniture company in South Africa. DI Cullen and DCI Pennington from the NCS have great interest in Leroy's return, which coincides with the arrival in London of some high-grade heroin, believed to be smuggled by a South African drugs cartel. A jealous Harker follows Rickman and Jones back to their hotel.
Louise Delamere guest stars as Nina French in this episode.