Starring: Dylan O'Brien, Tyler Hoechlin, Holland Roden, Tyler Posey
Character mistake: Theo applies a tourniquet to Lydia's torso in order to stop her from bleeding, he is later congratulated by Melissa who is a nurse. Tourniquets are not to be used for heads or torsos, only limbs.
Character mistake: Tracy supposedly rips Lydia's tongue out to stop her from screaming. The only problem is that the tongue is not needed to produce a scream.
Continuity mistake: While Stiles and Scott are at the vet getting the black dust, the vet puts the mountain ash on the table and says it's for Stiles. Stiles picks up the bottle and it's in his hand. A shot later the bottle of ash is back on the table, but Stiles never put it down. Then the shot after they show it on the table, it's back in Stiles' hand and he sets it back down.
Trivia: This is Colton Haynes' third time playing a supernatural creature. He was a Werewolf in "The Gates" and a Jackal in "Nine Lives of Cloe King."