Eddie Izzard

~ as ~

Robert Watson Watt

Laura Fraser

~ as ~

Margaret Watson Watt

Lesley Harcourt

~ as ~

Secretary Helen

Alex Jennings

~ as ~

Henry Tizard

David Hayman

~ as ~

Frederick Lindemann

Julian Rhind-Tutt

~ as ~

Albert Rowe

Karl Davies

~ as ~

Arnold 'Skip' Wilkins

Celyn Jones

~ as ~

Edward 'Taffy' Bowen

Iain McKee

~ as ~

Higgy

Tim McInnerny

~ as ~

Winston Churchill