Freewheelers is a British television series which ran between 1968 and 1973 (8 series/104 episodes). It was the brainchild of television producer Chris McMaster.
The opening story introduces us to three young people who become caught up in the plans of ex-Nazi officer Karl von Gelb (Geoffrey Toone) to “reverse the verdict of the last war” and inflict revenge on his former enemies.
Under the direction of Colonel Buchan (Ronald Leigh-Hunt) of MI5 the trio thwart von Gelb’s scheme to launch Polaris missiles on London from a captured nuclear submarine.
This set the template for future stories with the teenagers regularly preventing von Gelb from carrying out massive and ingenious threats to Britain’s security.