“A” is back to wreak havoc on another small-town group of teenagers. Only three short years after its series finale aired on Freeform, Pretty Little Liars is getting a reboot from Riverdale showrunner Roberto Aguirre-Sacasa. Do we need this? Probably not. But because Pretty Little Liars was basically a women-driven Riverdale before Riverdale existed, color us intrigued. Here’s what we know so far.