Working out that Jo and Dan have driven to Gretna Green Charlie and Caroline set off after them with Dan's parents,Peggy and Jim,both of whom are very bad passengers,and to cap it all the car runs out of petrol. Fortunately Laura is following behind with Tom and Auntie Pat and everybody arrives at the church just as the wedding is about to take place. One by one all the older parties agree the wedding should take place except Charlie - until Jo persuades him that really all he wants is to see her happy. Charlie thus becomes the father of the bride.