Continuity mistake: When Derek finds the note on his car it's snowing, in the next shot it's not.
Teen Wolf (2010)
1 mistake in Heart Monitor
Starring: Dylan O'Brien, Tyler Hoechlin, Holland Roden, Tyler Posey
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."