'The Heavy Water War' - Trailer

This 6-episode TV series tells the story of Operation Grouse, the action by Norwegian commandos who blew up a power plant and prevented the Nazis from getting access to the deuterium oxide (a/k/a heavy water) they wanted to use in the nuclear reactors that Germany wanted to build. If you can handle the subtitles, this is yet another example of the amazing untold stories of WWII.