Guest Stars Linden Ashby as Sheriff Noah Stilinski JR Bourne as Chris Argent Melissa Ponzio as Melissa McCall Dylan Sprayberry as Liam Dunbar Ryan Kelley as Deputy Jordan Parrish Seth Gilliam as Dr. Alan Deaton Ian Bohen as Peter Hale Orny Adams as Coach Bobby Finstock Khylin Rhambo as Mason Hewitt Jill Wagner as Kate Argent Meagan Tandy as Braeden Claire Bryétt Andrew as Sydney Cody Saintgnue as Brett Talbot Steven Brand as Dr. Gabriel Valack John Posey as Dr. Conrad Fenris