5x6 - Heartbeat

A German man, Dieter comes to the village in search of his fathers grave. Many of the locals take exception to him, especially a young man (who's part of moorland rescue) knows that the Dieter's father bombed his parents house in the war. Nick can't understand peoples attitude to him, and Gina agrees. An old man who has been coming to Aidensfield with his wife on holiday for years suddenly goes missing with Claude. A search is mounted and Dieter wants to help. But he goes off track on the moors and falls in a swamp. Nick does his best to help him but eventually the man from moorland rescue is persuaded to save him. Nick apologises to Maggie for what he said to her after Kate's funeral. Maggie notices a run away train, Nick chases it only to find that its the old man and Claude who had been driving it! - Blaketon is annoyed that he can't charge Greengrass but has to hand the matter over to the transport police!