Well I'm torturing myself with a complete series watch of Dr. Who from Season 1 on and in the 27 seasons I've watched so far we find the Doctor and his companions in the WWWII on only a couple occasions.
The first instance is during "The Curse of Fenric" in which the Doctor and Ace have to stop the evil machinations of an otherworldly enemy that is bent on causing the world to die by biological warfare unwitting unleashed by the British in their bombing campaign over Germany. Can the Doctor stop it or will the Earth die out?!
The next time we see the Doctor in WWII is in episodes "The Empty Child" and "The Doctor Dances" in where the Doctor, Rose and Captain Jack find themselves in WWII London during the Blitz running from a child in a gas mask that has supernatural powers and that can turn you into a zombie by just touching you. Can they solve this horrific mystery or will the world see a evil worse then the Axis cover the world?!
So if you want to see the Doctor in some Weird WWII action then check 'em out!