Trouble in Mind - S4.E7

Mr Parker comes to Aidensfield unable to recall the last 7 years of his life. It is suggested that when he left the village back then, he left his family and disappeared after collecting his employers payroll. Kate contacts his wife Helen who agrees to see him. Complications occur when another woman turns up claiming to be his wife. Claude goes to see 'strangers on a train' at the cinema, he then receives a strange proposal from a man who took the plot of the film a bit too seriously. It involved strangers carrying out each others crimes. Greengrass isn't interested in getting involved in such a scheme but the stranger keeps pestering him. Claude still refuses but soon finds out his barn had been burnt down shortly after he admitted the insurance was worth more than the barn itself. The stranger kidnaps Alfred, Nick and Greengrass go to investigate, and Alfred is found much to Claude's relief.