He's the older brother of French teacher and guidance counselor Ms. Morrell.
Derek Hale becomes convinced that he is The Alpha after the Vet lies about a dead deer found with a spiral pattern burned into its side. Derek attacks and knocks the man unconscious, ties him up and dumps him into the back seat of his car. He then disappears just before The Alpha attacks Derek at the BHHS. (read more...)
He is sitting in an Ambulance receiving treatment a few hours later. Scott asks him how he got away but he is vague in his response. (read more...)
After Scott is attacked by hunters, Deaton finds him and takes him to his clinic for treatment of bullet wounds. He explains that treating animals is only 90% of his work. (read more...)
When Peter Hale shows up to get Scott at the clinic he is repelled by a balustrade of Mountain Ash. He becomes so frustrated at this, he throws a chair at the Vet. Deaton doesn't flinch as the chair smashes into the wall beside his head. (read more...)
Scott tries to ask him how he knows about werewolves. Chris Argent later shows him a dead Hunter and asks him what killed him. He explains to Scott that his wound is not healing because it was inflicted by an alpha. (read more...)
As he is treating Scott's wound, he explains that the hunters have a book of all the creatures they've encountered and that it might have information about the new Lizard Creature. When the hunters return with Gerard in tow, the old man calls him by his first name, "Alan", and says he thought he had retired. The vet then proceeds to describe what he has gleaned about the creature from how it killed the hunter. (read more...)
Scott, Isaac and Derek visit Dr. Deaton in hopes he can help them capture Jackson. He gives them Ketamine to subdue Jackson. He gives Stiles a powder made from Ash trees and says it can bind the kanima because it can stop supernaturals. He explains that the entire Vet Clinic is lined with the stuff. Stiles has to make a circle of the stuff all around Jackson to keep him from escaping. It seems Ms. Morrell has an existing relationship with Deaton when she comes to visit at the end of the episode. (read more...)
When Isaac comes to the clinic for Scott's advice, Deaton shows him how to use his pain transference abilities on a sick dog. (read more...)
Dr. Deaton helped Scott prepare capsules filled with Mountain Ash powder to help Scott dose Gerard. He seems to be tracking Gerard, examine the area where he was last seen and following the trail of black goo the older man was leaving behind. He meets up with Ms. Morrell who says she's glad he's out of retirement to which he responds, "Who ever said I was retired?" (read more...)
The sheriff comes to visit Deaton looking for answers after several reports of bizarre animal behavior. Deaton shows him a room full of dead cats and explains they all killed themselves. (read more...)
Scott enlists Deaton's help to get Isaac to restore his memory of the night he found Boyd and Erica. Using a tub filled with ice and water, Deaton slows his heart rate to putting him in a trance-like hypnotic state and talking him through his memories. (read more...)
Stiles seeks his help during the second string of ritualistic Threefold Death murders. While Stiles thinks they may be connected to an ancient people known as Druids, Dr. Deaton explains that they were philosophers not serial killers. He says the murderer is NOT a druid. Later they discover a message left by Adrian Harris pointing to a Darach (Dark Oak) as the culprit. (read more...)
Scott seeks his advice before a planned attack on The Alpha Pack. After the attack, Ms. Morrell brings Kali, Aiden and a badly injured Ennis to Deaton for treatment. Deaton manages to stabilize Ennis but can only watch as Deucalion kills the Alpha on the examination table. (read more...)
Deaton gets kidnapped by the Darach and lets Scott know that this will occur. He is taken to the abandoned bank from Chaos Rising and is suspended by his arms in a vault. Scott attempts to save but he is surrounded by Mountain Ash. As Scott tries to push throught he barrier Deaton notices Scott's turning red. After the sheriff releases him Deaton informs Scott that he is a "True Alpha". (read more...)
Dr. Deaton's life with The Hale Family is shown through Gerard and Peter's flashblacks. When Deucalion decides to meet Gerard to make peace he advises him to be careful by bringing up the story of the Toad and the Scorpion. Later he treats Deucalion damaged eyes to the best of his ability. (read more...)
Dr. Deaton decides the best way to save their parents is to have Scott, Stiles, and Allison be surrogate sacrifices for them. He admits that while it is possible to bring them back it is still very dangerous. (read more...)
After the ritual is complete he tells the three that they had four hours until the eclipse to put any plan in motion. Later he helps save the Alpha Twins when Jennifer breaks their necks. (read more...)
Questions about his Name
During season one this character's name was in dispute. It is only mentioned once in Season 1, by Stiles in Night School. While it apparently appeared as Dr. Deaton on the call sheets for the production it appeared in no official public sources that could be considered official canon for the show. It was mentioned in the Teen Wolf webcomic at MTV.com, but events and characters in that publication do not match what happened on the actual show and so are not, at this time, considered official canon.
At the start of filming for Season 2 the name "Deaton" was added to official source material. It also now appears in the credits of the show as well. He has now been called "Alan" on screen but there is no official spelling available for his first name.
- “I’m sure you’re well aware of what your abilities can do for you. Improve strength, speed, healing; ever wonder what it could do for others?” — Dr. Deaton to Isaac in Battlefield