Jason returns to stop Ali from getting too close to Mary; The liars learn something new about Mary and Jessica; Ezra gets a call about someone in his past; Noel grows more suspicious.

Cast: Troian Bellisario, Ashley Benson, Tyler Blackburn, Lucy Hale, Ian Harding, Shay Mitchell, Andrea Parker, Janel Parrish, Sasha Pieterse, Jim Abele, Lulu Brud, Brant Daugherty, Dre Davis, Afsheen Olyaie, Nia Peeples