Teen Wolf/Season 2

Plot threads

 * The Kanima: A reptilian shape-shifter begins murdering seemingly random people in Beacon Hills. Scott and Stiles learn some information about it from a beastiary and discover that it is being controlled by another and that it is afraid of water. A shocking twist reveals that the Kanima is actually their own schoolmate - Jackson Whittemore.
 * Lydia's meltdown: Lydia Martin appears to be immune to the werewolf bite, but suffers intense nightmares and hallucinations; all the while being haunted by the ghost of werewolf Peter Hale.
 * Hunter-in-training: With the arrival of Gerard Argent, Allison's training as a hunter is kicked up a notch. She improves her skill with a crossbow and her father tries to toughen her up by making her endure a series of personal trials.