An Englishman's Castle (1978)

In a world in which Germany won World War II and has occupied the United Kingdom, Peter Ingram is a writer on a popular soap opera called "An Englishman's Castle" that is set in London during the Blitz. Ingram lives a quiet, boring life, deliberately oblivious to the subtle rule of the local Nazis. His eyes are opened when the woman he is involved with reveals that she is both a Jew and a member of the Underground. Will Peter help overthrow his country's oppressors?