The 'WandaVision' finale did what it had to do - not what we wanted it to do David Betancourt, The Washington Post March 6, 2021 FacebookTwitterEmail Note: This story contains spoilers about Episode 9 of "WandaVision." - - - The season finale of "WandaVision" has some 'splainin' to do. Last week's cliffhanger ending of Agatha Harkness (Kathryn Hahn) declaring Wanda (Elizabeth Olsen) the one true Scarlett Witch -- as well as a post-credit scene that gave us Paul Bettany's all-new, all-white Vision -- set the tone for a double main event. If you thought this season (or series?) was going to end any other way but a superhero/villain brawl with capes flapping, hands and eyes glowing and lots of flying, zapping and destruction, well, you haven't been watching Marvel Studios for the last decade.