WARNING: SPOILERS/NSFW - DC on SCREEN #142 - Supergirl 1x18 - Worlds' Finest | Review - Supergirl meets The Flash! Let's talk about the second most anticipated crossover of the year!  Magic is introduced into the Supergirl universe as is the fastest man alive, Barry Allen (who just may be the perfect match for Kara if you ask at least one DC on SCREEN host)!  So we have Silver Banshee and Livewire teaming up to kill Cat Grant and Kara Danvers while james wrestles with jealousy and Winn geeks out with Barry about the multiverse. Seriously, what's not to love? Oh, right. The villains...