Angel: 1943

A vampire named Lawson shows up at Wolfram & Hart to exact revenge on Angel, who, as an aid to the U.S. government en route to pick up a German submarine during World War II, made Lawson a vampire in an attempt to save his life while at sea. While aboard the ship, Angel also found out that the government was carrying a group of vampires, including Spike, who were captured by the Nazis and forced to help them carry out their deeds.