His name is now a term that means traitor. That’s because after two decades of working for the Norwegian government in various roles, he collaborated with Hitler and the Nazi party, welcomed the German occupation of his country.
Research:

Behind the Scenes Minis: Whoopsy Whimsy
24:41

Great Lisbon Earthquake of 1755
39:02

Benzedrine, Pervitin, and WWII
39:42