Senior American Officer
Three American prisoners – including Carrington – are brought in to join lone countryman Phipps. However they are given preferential treatment and access to American newspapers, a deliberate ploy to make the British believe that they are spying for the Germans. Preston learns from the senior American, Colonel Dodd, that the trio are on a secret mission to make contact with the Hungarian free government, but they realise that they are under surveillance for information and must thwart the eavesdropper.