Not a joke, but for real: someone made a sitcom about Hitler and Eva Braun. They lived next to a Jewish family (and were hiding in America after WW2) and were constantly trying to kill them, at which point hilarity ensued. Six episodes were shot but only one was ever shown.
Here's the first part:
Click to view
And the second:
Click to view
And don't you just love the posted comments by the halfwits? "A brilliant parody of 50's American sitcoms DUR HUR HUR." No, guys, it really isn't.
GAH! I need some brain bleach, anyone have a cup handy?