"The Ghost Talks" is the twenty-first episode of the 1969 ITC British television series Randall and Hopkirk (Deceased) starring Mike Pratt, Kenneth Cope and Annette Andre.
With Jeff laid up in a hospital bed with one arm and one leg in plaster (having fallen off a balcony whilst trying to apprehend a safe-cracker), Marty visits and seizes the opportunity to tell him about a spy drama that he handled while he was still alive — the details of which he has never previously revealed — involving a corrupt MI5 official and spy ring.
While Jeff was out of town, Marty was hired a man who claimed to be Sir Basil Duggan, a top MI5 official, at a country club to retrieve "stolen" important documents from a supposed unloyal member of the British Secret Service.
However, the morning after Marty and his hired Liverpudlian safecracker (who also personally steals a diamond necklace) successfully locate the documents, it turns out to be an actual theft from the real important member of MI5.
Marty tracks down the imposter's car registration number and shadows him to the docks where the Brenan plans an escape with the stolen documents aboard a ship to a foreign country.