Guest Stars Tyler Blackburn as Caleb Rivers Janel Parrish as Mona Vanderwaal Keegan Allen as Toby Cavanaugh 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 Nolan North as Peter Hastings Brant Daugherty as Noel Kahn Yani Gellman as Garrett Reynolds Annabeth Gish as Dr. Anne Sullivan Co Starring David DeSantos as Mendez