If you haven't been watching 3Below, the Trollhunters spinoff series that's part of Guillermo del Toro's "Tales of Arcadia", now's a great time to start. The first 13 episodes of DreamWorks Animation's Netflix show continued the adventures of the newest arrivals in Arcadia Oaks: Aja, Krel, and Vex. Unbeknownst to most of the citizens of the small California town, this trio is from far, far away; they're royals on the run after a military coup overthrew their family's rule on the advanced alien planet of Akiridion-5. Now in disguise, they're trying …