by Mervyn Haisman and Henry Lincoln
Starring Marius Goring
with Ann Morrish
and Victor Winding, Michael Farnsworth, Valerie Murray
Guest stars: Peter Barkworth, Timothy Bateson, Jean Marsh, Glyn Owen

A smashed lock, a bloodstained jacket, a drifting boat... and a takeover bid. Dr. Hardy accepts a case which takes him out of his own exact world of scientific evidence and into the speculative world of finance. And yet, even in strange waters, with the aid of a few bright feathers and silk thread he solves the mystery of a disappearing man.
(Colour)