The Great Impersonation.

Baron Leopold von Ragenstein is an impostor of Eton College classmate Sir Edward Dominey (Ralph Bellamy) and has known one another since their days at Eton. The story picks up in the jungle where Domineys is found severely ill in the Dakar jungle and is brought into his old college buddy's camp, where he heals from his injuries. The German High Command sanctions the German spy's mission to go undercover into Britain and infiltrate the English upper ranks.