Commando Comic #1598: 'Super Spy' (1982)
 
His name was Sean O'Flaherty. He'd had been in the Royal Navy until he was wounded, and now he was a smuggler, bringing hard-to-get supplies into war-torn Britain. He made no profit out of it - the excitement and the fact that he was helping his country were reward enough.
 
And excitement a-plenty was what he got one fateful night when he met up with a German U-boat off the Scottish coast, for according to its commander he was a spy for teh Nazis and his valuable information was needed in Berlin immediately!