Henry Cole and his team embark on their most ambitious project to date: the restoration of the first-ever Bell 47 'Sioux' helicopter built in the UK by Westland Aircraft. They work under expert guidance from the Historic Army Air Flight to return this iconic 1960s aircraft—formerly flown by the British Army’s 'Blue Eagles' aerobatic team—to flying condition. The project marks a major departure from their usual shed finds, as they race against time to prepare the historic machine for the Bell 47’s 80th Anniversary Flight.