It gave perspective to both guys that we haven't seen yet, especially Darius.

Zan was annoying at first, but it was obvious he was supposed to be (I don't know if I've laughed harder than when he hoverboarded away with a big kool aid smile on his face). But it's obvious that Alfred eventually understood him, outside of all the contrived showmanship.

And Darius is a sharp, sharp dude. He's like Atlanta's version of Luna Lovegood from Harry Potter: spacey and eccentric, but insightful and loyal as hell.

I wouldn't consider this episode filler at all.