Dr. Deaton

The Veterinarian (Dr. Deaton) is a recurring character in Teen Wolf and is played Seth Gilliam. He works at the Beacon Hills Animal Clinic where he is Scott McCall’s boss. He is aware of the existence of werewolves and seems to know quite a bit about them.

Season 1
Sheriff Stilinski has sought out his help and advice on two occasions in the ongoing investigation of recent animal attacks. On the second time, he is shown to be very nervous and tries to get him to leave.

In Heart Monitor, Derek Hale becomes convinced that he is The Alpha after the Vet lies about a dead deer found with The Spiral burned into its side. Derek attacks and knocks the man unconscious, ties him up and dumps him into the back seat of his car.

The Vet disappears just before the Alpha appeared at the end of Heart Monitor but reappears seemingly unharmed at the end of Night School. Scott asks him how he got away but he is vague in his response.

In Co-Captain he finds Scott and takes him to the Animal Clinic to remove the bullet. He says treating animals is only 90% of his work and suggests that he has treated werewolves before.

In Formality, it becomes clear he has enough knowledge about werewolves to ward off attack. Peter Hale is unable to cross a balustrade made of Mountain Ash.

Season 2
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 now...)

Dr. Deaton treats Derek after Peter's Resurrection (see Party Guessed). He explains that he promised Derek's mother that he would look after what was left of the Hale family. (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.