"The Call of the Wild" 16 September 1989
Calum has an article published in the Veterinary Record. Siegfried thinks Calum plans to accept a job in Canada after he chastises him about bringing wildlife into Skeldale. James helps Barbara Hazlitt determine whether her collie has the aptitude to become a sheepdog. Siegfried and Calum visit Mrs Bond to treat one of her many felines, including the son of the late and vicious Boris. Deirdre and Calum get married. Tristan returns from Ireland to be best man.
Characters: Calum Buchanan (final appearance), Deirdre Buchanan (final appearance), Barbara Hazlitt, Mrs Bond, Mr Skipton, George (postman).
Tristan Farnon returns but does not appear for the remainder of the series