Another creepy nautical story from the 1950s "One Step Beyond" TV series. The story is supposedly based on fact, but IMO only loosely. I won't give away the plot, except to say it involves a Nazi official escaping from Germany by submarine at the end of WW II.

The wreckage of a German sub was found off the coast of Argentina in 2015.
Several thousand Nazis are known to have escaped to South America, so it is not inconceivable that some traveled by submarine.

The sub in the TV show is identified as U-147. However, the real U-147 was sunk by British warships in 1941. Enjoy the show!