1 9 6 9 (UK)
6 x 25 minute episodes
This six-part BBC thriller was set against the spacious background of the Western Isles in Scotland.
TV reporter Eddie Prior (William Lucas) returns from a job in Bangkok to find an anonymous letter telling him his wife has been unfaithful. He goes to an island in the Firth of Clyde where she is on holiday only to be told that she has drowned.
Other main characters included Liz Elliot (Claire Nielson) who helps Eddie to unravel the mystery, and strange and sinister ecologist Mr Cadwaller (Peter Copley).