Randall and Hopkirk (Deceased) (1969)

S1E17 Somebody Just Walked Over My Grave

Marty discovers someone excavating near his grave and enlists Jeff to look into the matter at the cemetery. However, Jeff soon finds himself repeatedly knocked out by a mysterious figure wielding an axe from the 18th century. Suspecting the local gardener, Jeff takes on a job for a wealthy resident of a nearby mansion, only to uncover a complex scheme involving the kidnapping of the man's agoraphobic son. The plan involves a mock ransom tied to an underground tunnel aimed at claiming the father's wealth, but it unravels when he weds his young housekeeper. Geoffrey Hughes portrays Harper, while Andrew Sachs has a brief role as an English commentator during an international football match that Marty attends.