Hawker Sidderley's Trident airliner, first developed in the 1950s, ushered in the "Jet Age" of civil aviation for millions. The Trident pushed the limits of technology, from its outstanding speed capabilities to its revolutionary Automatic Landing system and triplicated dual controls. It was a true milestone in British aviation history - but never achieved its full potential. This unique documentary - featuring much rare footage from the BAE Systems archive - reveals why the Trident blazed the way in civil aviation, but fell victim to the Boeing 727, which it had inspired.