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, Callum Mill as Sgt. Forbes
From Scotland

A bullet in the tyre causes Eddie's car to crash and he recovers consciousness in the guardroom of a Naval base where a suspicious C.O. questions him. Released, he is surprised when Forbes says that Shaw was killed in the crash. Eddie insists that he was alone in the car, and when Dewar denies that there's a bullet in the tyre, Eddie suspects him of being the marksman.
Liz tells Eddie she's had a phone call from Helen - her sister isn't dead. Eddie goes off to rendezvous with her in Glasgow. Forbes tells Liz that Shaw was murdered and Eddie is number-one suspect.