Plot: A siege is underway… the gunman who took PC Gary Best's dad is now holed up in a building, and when Inspector Gina Gold finds out two elderly residents, one a diabetic in urgent need of medication, are trapped she has to decide whether to let SO19 take him by surprise. When Smithy volunteers himself as a hostage in return for the elderly couple to be released, his actions are totally against protocol, much to Inspector Gold's dismay