Heartbeat S16E03 - Intelligence Matters

The Ashfordly team join forces with DS Dawson and a shady MI5 agent in the hunt for a Russian trawlerman suspected of being a spy, but Carol soon discovers the government worker has secrets of his own after witnessing a shocking stand-off at a railway station. Meanwhile, Aunt Peggy fancies herself as Aidensfield's very own Miss Marple after an old note among a dead friend's belonging raises questions about her cheating husband's disappearance, whilst Miller is suffering from a terrible toothache.