The Blue Peter

The title is derived from the flag of England's Outward Bound Sea School at Aberdovey, Wales: Mike Merriworth, a Merchant Navy hero of the Korean War returns to England after three years of captivity in Communist hands, his mind confused by brain-washing and indoctrination at the hands of his captors, and accepts a post as an instructor at the Outward Bound Sea School. (imdb)