Heartbeat S10E06 - The Fool on the Hill

Craddock's mother Enid visits Aidensfield and fancies herself as a Miss Marple figure when she witnesses an attempted murder, but her efforts to catch the culprit drives her son mad. Meanwhile, Greengrass is delighted when he wins big at the bookies, until he discovers David has lost the winning ticket after taking Alfred to the vets, which causes more trouble than expected.