Tony Maylam's film is based on Erskine Childers' classic novel Set in 1901. Arthur Davies, whilst out sailing in the North Sea, has a run-in with a German captain, Dollmann. His suspicions aroused, he acts quickly as Germans are planning an invasion of Britain and they are the only two who can stop them.
The Riddle of the Sands is a Film programme that first aired in 1979 and has been classified a U certificate.
