Main Article: Derek Hale
Prior to the events in the first episode, Derek returns to Beacon Hills after the death of his sister. Scott McCall initially blames Derek for biting him and turning him into a werewolf. He rescues Scott from a group of Hunters and claims Scott has a gift despite what he thinks right now. (Read More..)
Derek threatens Scott from trying to play a lacrosse game after he nearly goes berserk at practice. The police arrest him after finding the other half of his sister's body at the Hale House. (Read More...)
He also attempts to keep Scott away from The Alpha, explaining that the beast wants Scott to kill with him and join his pack. Derek claims he was not responsible, and that another werewolf, The Alpha, is the one who bit Scott. Derek tells Scott that if The Alpha finds him, Scott will have to kill with him or be killed. (Read More...)
Derek is shot in the arm on by Kate Argent. The bullet was tipped with Nordic Blue Monkshood (wolfsbane). The bullet poisoned him, bringing him near to death. Scott helped to save his life by stealing another of the bullets from Kate’s bag during dinner with the Argent family. Derek cured himself by burning the wolfsbane from the bullet and putting the ashes on his wound. (Read More...)
Lead hunter, Chris Argent, believed Derek knew the identity of the Alpha and ordered that he be tracked in hopes he would lead the hunters to The Alpha, but when Derek revealed to Kate that he did not know, she tried to kill him (contrary to the hunter’s moral code to not kill any werewolf not proven to have spilled human blood). (Read More...)
He visits his comatose uncle to get answers and later attacks Dr. Deaton when he thinks he's the Alpha. Derek was attacked by The Alpha at Beacon Hills High School. The Alpha attacked from behind and lifted him off the ground as gouts of blood poured from his mouth. (Read More...)
On the night of the full moon, Derek seemed fully recovered and stopped Scott from attacking Jackson and Allison. Then, the two werewolves fought in the woods until Scott regained control of himself. Scott asks if there is a cure and Derek says he has heard of one, killing the Alpha responsible for the bite, but that he doesn’t know if it is true. (Read More...)
Derek saving Adrian Harris from the Alpha. He is then forced to go on the run from hunters and the law because Scott has told them that Derek is responsible for all the mysterious attacks and claimed that he had tried to kill the young cast during Night School. Derek ends up hiding at Stiles’ house. Stiles claims Derek is his “cousin Miguel” and uses Danny obvious attraction to Derek to convince the young man to help them hack the cell phone. Danny tracks the text to a Melissa McCall's computer at Beacon Hills Memorial Hospital where Derek and Stiles find out the Alpha is actually a fully recovered Peter Hale. (Read More...)
Derek seemed to have joined forces with his uncle and worked to eliminate Jackson because he had learned Scott’s secret. At the end of the episode Derek was captured by Kate and was chained in a cellar beneath the Hale House. She used an electrical device to torture him. (Read More...)
Kate introduces Allison to the concept of werewolves by showing her Derek on the torture rack. She attempts to interrogate him only get nowhere with him. (Read More...)
After Scott rescues Derek, helps attack the Alpha. The kids burn and cripple Peter but it is Derek, over the protestations of Scott, who delivers the death blow, slashing his claws across the Alpha’s throat killing him and assuming his position and powers. Derek is later confronted by Jackson Whittemore who demanded to be bitten and turned into a werewolf. Derek advances toward the boy and shows his fangs but the scene cuts away without revealing if Jackson got his wish. (Read More...)