Popsugar Entertainment Tv Timeline of the Night Alison Disappears Pretty Little Liars Pretty Little Liars: A Timeline of the Night Ali Disappears August 3, 2015 by Sundi Rose View On One Page Photo 3 of 21 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 3 Before That Night: Late Summer Alison and "A" exchange messages using the local newspaper and arrange a meeting later — probably on Labor Day. It's unclear who Alison thinks is "A," but the likely suspect at this time is Jenna. Previous Next Start Slideshow Pretty Little LiarsTV