Harry and Douglas, helped by Sylvia, rescue the ailing king from hospital and bundle him into an ambulance with a view to sending him to safety in America. A flat tyre leads them to seek assistance at a farm house where they are almost betrayed and need to move on, arranging to meet Resistance leader Mayhew at the airfield. However they have walked into a trap - which at least draws Nazi attention away from the destruction of the bomb factory, as Douglas discovers a lesson in treachery. Douglas is captured and his friends killed whilst Barbara is destined to be deported. Douglas's freedom now depends on Huth, himself doomed to die by Kellermann.