Dark Journey is a 1937 British spy film directed by Victor Saville and starring Conrad Veidt and Vivien Leigh. Written by Lajos Bíró and Arthur Wimperis, the film is about two secret agents on opposite sides during World War I who meet and fall in love in neutral Stockholm. It was shot at Denham Studios, with sets designed by the art director Andrej Andrejew as assisted by Ferdinand Bellan. The film's costumes were by René Hubert.
One of the most closely guarded secrets of the war, a Q-ship was a heavily armed merchant ship with concealed weaponry designed to lure German submarines into making surface attacks and then open fire and sink them. The idea was to be a wolf in sheep's clothing. Their codename referred to their home port of Queenstown (now Cobh) in County Cork, Ireland.