When a body is found near an elite boarding school, the team reinvestigates the disappearance of a young PE teacher five years earlier. Preparing for a visit from a prominent MP, the school isn't very helpful. Brian, meanwhile, struggles to keep a secret.

In 2003, a 17-year-old girl went missing in Scotland and was presumed dead. When her DNA turns up at the scend of a recent London robbery, retired Glasgow detective Steve McAndrew aarrives to help. A bundle of Scottish energy, he immediately ruffels feathers,