When a young vicar is accused of seducing a grieving widow, Kavanagh defends him but encounters a mysterious turn when the two suddenly become engaged.
Compo speculates why blood rushes to the head when upside down but not to the feet while standing up, so Seymour sets up an experiment to demonstrate the way the body works.
Seymour takes it upon himself to supervise repairs to a boat, and together with Clegg tries to persuade Compo to take up canoeing to improve his physique.
