A father-son birdwatching outing becomes a widespread mystery when teenage John Corby—after coming to the aid of neighbour Susan Fraser—finds that his father Tom has vanished.
Tom Corby
John Corby
Susan Fraser
Bowers
Selby
Kessler
Motorcyclist
Morrison
Bartas
Mrs Bartas
Fisherman
Skipper
Chauffeur
CI Dunn
Petrol Assistant
Police Observer
Police Sergeant
Police Superintendent
Rescuer
Ambulanceman
Watcher