Craddock is irked when the Chief Constable asks Blaketon to organize a Crime Prevention committee as tension boils over within the community following a number of unsolved burglaries. Blaketon tries to prove the committee's value by investigating a robbery at a brewery. However, it soon leads Mike into an encounter with a strange individual whose odd behaviour intrigues him. Meanwhile, Greengrass begins rewriting history when he takes a group of Norwegian history students on a tour of Yorkshire. But David soon gets carried away when the students take an interest in historical Viking sites. Elsewhere, a handsome Irishman called Andy Ryan checks into the Aidensfield Arms and whisks Gina off her feet!