Christine Granville was, at least apocryphally, Winston Churchill's favourite spy. Born Maria Krystyna Janina Skarbek, daughter of a charming but dissolute Polish aristocrat and a Jewish banking heiress, she was described in 1939 as "a flaming Polish patriot … expert skier and great adventuress". So she was.
In 1941, the Special Operations Executive forged documents, including passports, in order to help the resistance. Here's the one they made for Adolf Hitler, with a better view of the photos available on this site.
WANTED: The Limping Lady. The Gestapo's poster read "She is one of the most valuable Allied agents in France and we must find and destroy her" but Virginia Hall, who used a prosthetic limb after losing a leg years before in a hunting accident, eluded them and saved countless Allied lives while working as a spy during WWII. Additional biographical information, as well as the biographies of other famous female spies, at WWII Female Spies (which has many outgoing links to other great informational resources about female spies in WWII).
You've probably heard of the WWII Navajo "code talkers" who managed to baffle crack Japanese cryptanalysts and were credited with enabling US success at Iwo Jima. Civil engineer, journalist and photographer Philip Johnston was the determined mind behind the "windtalkers". The son of missionaries, Johnston grew up on a Navajo reservation and was one of only a handful of outsiders fluent in the Navajo language. A bit of his background is included this article, and you can read a complete history of his plan, view an archive of photos by Johnston, and see copies of his enlistment application letter to the Marine Corps commandant, as well as a recommendation letter from the Commanding General. (more inside...)
Nazis planned Palestine subversion. British secret intelligence files have been released in London about a German wartime plan for subversion in Palestine. Nazi Gold, secret parachute drops and the Grand Mufti.