The Angry Hills

The Angry Hills by Leon Uris Michael Mike Morrison is an
American author and recent widower who is
in Greece during World War II to receive an inheritance.
When everything is almost finished the Greek lawyer asks
him to take a letter to a friend in London. Soon
everything is turned into a living Hell to Morrison as the
Germans invade Greece and the letter turns out to be of
extreme importance to the resistance movement. In the
movie version set in Athens in Piraeus and in village
areas Mike is played by Robert Mitchum as a journalist. He
happens to have met a leading figure of the Hellenic
resistance movement years earlier and now that gentleman
sees him as the means to get the list of useful Hellenic
figures to British Intelligence. Along the way he joins
resistance fighters keen to liberate their nation from
Nazi oppression but must also deal with at least one
British traitor named Bluey and several Greek traitors or
collaborators.