[s5e13] How — The 'a' Stole Christmas

In the Pretty Little Liars Season 5 Christmas episode, "How the 'A' Stole Christmas," the Liars investigate Alison at a masquerade ball while dealing with spectral visions of Mona. Evidence found at the DiLaurentis home links Ali to Bethany Young, aiding Spencer's defense before a final holiday message from A. For a detailed breakdown, visit Pretty Little Liars Wiki .