Trailer for the 1942 WWII thriller, THE INVSIBLE AGENT, starring Ilona Massey, Jon Hall, Sir Cedric Hardwicke and Peter Lorre.

Per IMDB: The film was nominated for best visual effects at the 15th Academy Awards in March 1943. However the winner was Reap the Wild Wind (1942) which featured a ship wreck and an undersea attack by a giant squid.