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.
Character mistake: The poster advertising the Formal misspells Beacon Hills as 'Becon Hills'.
Revealing mistake: When Derek is training Isaac how to fight, Isaac is forced to repeat his approach many times, which results in him being smacked down by Derek. During certain shots, as Isaac is about to plummet to the ground, his hoisting wire can be seen. (00:12:35)
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."