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 1 of 21 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Before That Night: Halloween 2008 "A" made their presence known long before they started stalking the liars, back in 2008. Alison gets her (probable) first text from their stalker. The text reads, "I'm watching you." Jenna meets Alison for the first time in a costume shop, both looking for Lady Gaga costumes. Previous Next Start Slideshow Pretty Little LiarsTV