Guest Stars Tyler Blackburn as Caleb Rivers Keegan Allen as Toby Cavanaugh Janel Parrish as Mona Vanderwaal Lesley Fera as Veronica Hastings Tammin Sursok as Jenna Marshall Torrey DeVitto as Melissa Hastings Brendan Robinson as Lucas Gottesman Nia Peeples as Pam Fields Brant Daugherty as Noel Kahn Yani Gellman as Garrett Reynolds Ryan Merriman as Ian Paloma Guzmán as Jackie Molina