England, while the storm clouds of Nazism menace Germany. Robert Watson Watt and a team of eccentric and brilliant meteorologists struggle to turn the mere idea of radar into a functional reality.
| Actor | Role |
|---|---|
 Suzy Eddie IzzardRobert Watson Watt | Robert Watson Watt |
 Laura FraserMargaret Watson Watt | Margaret Watson Watt |
 Lesley HarcourtSecretary Helen | Secretary Helen |
 Alex JenningsHenry Tizard | Henry Tizard |
 David HaymanFrederick Lindemann | Frederick Lindemann |
 Julian Rhind-TuttAlbert Rowe | Albert Rowe |
 Karl DaviesArnold 'Skip' Wilkins | Arnold 'Skip' Wilkins |
 Celyn JonesEdward 'Taffy' Bowen | Edward 'Taffy' Bowen |
 Iain McKeeHiggy | Higgy |
 Tim McInnernyWinston Churchill | Winston Churchill |