A thriller serial in six parts by Bill Craig
starring William Lucas as Eddie Prior, Claire Nielson as Liz Elliot, Aubrey Morris as Spinner, Peter Copley as Cadwaller and Callum Mill as Sgt. Forbes
From Scotland

Eddie tells Liz how the intruder attacked him and then escaped with, a roll of film he was about to project. The tinker, Shaw, learning of Helen's death, tries to blackmail Dewar, the local boat-man, in whose vessel she was drowned.
En route for the village police station, Eddie gives a lift to an ornithologist, Cadwaller, and later, when his car is sabotaged, Cadwaller shows up to return the favour. But he wants something in exchange - a roll of film.