Flashback! No, just flashing lights. Wait, wait, no, it's both! 'Portlandia' stars Fred Armisen and Carrie Brownstein hit 'The Tonight Show' last night to talk a little bit about their show's newest season (which starts tonight), which will apparently be heavy on the flashbacks and backstory. How did all of your favorite 'Portlandia' characters meet? This season just might pack a very special punch for you.