The Seventh Survivor is a 1942 British spy war film directed by Leslie S. Hiscott and starring Austin Trevor, Linden Travers and John Stuart.
[1] It was one of several British films of the time that take place predominantly on lighthouses including Tower of Terror and Sabotage at Sea.
However, there is some good news; Sir Edward receives a coded message from the ship's captain, informing him that Lloyd Harrigan, one of his most resourceful agents, is also aboard.
Six passengers make it to a lifeboat, three men (Robert Cooper, Thomas Pettifer and Toni Anzoni) and three women (Gillian Chase, Mrs. Lindley and Diane Winters).
They pick up Oberleutnant Hartzmann, the commander of the now-sunk U-boat, and soon after, reach a lighthouse manned by Sutton and his assistant Ernie.