The slashing of a 17th-century painting in Aspern Tallow Museum appears to herald the start of a series of ghostly manifestations by the ghost of Jonathan Lowrie. Cully's boyfriend Nico has just been given a part in a soap opera as a Detective Sergeant, and asks DCI Barnaby if he can shadow DS Troy to research the role. Guest starring Prunella Scales (Fawlty Towers).