|Powers and Abilities||Superior strength and sight, sharp fangs and claws, and a simple, animalistic personality.|
|Vulnerabilities||Silver, Vamptonite, Dismemberment|
|Appearance||Human except when under the influence of a full moon, when they have yellow eyes, fangs, and claws.|
|Episode(s)|| 2.17 Heart|
4.05 Monster Movie (mentioned)
4.13 After School Special (mentioned)
6.08 All Dogs Go to Heaven (referenced)
In mythology, werewolves are entities that are human but shape shift into wolf form during certain lunar timeframes. This phenomenon is also referred to as lycanthropy, for the Greek lykoi (wolf) and anthropos (man). The change from man to wolf is held to be possible by witchcraft or magic, and can be voluntary or forced by certain cycles of the moon and certain sounds (such as howling). In some folklore, werewolves are immune from aging and most physical diseases. They can be killed by any wound that destroys the heart or the brain or by any form of death that causes brain or heart damage (such as hanging or other oxygen-deprivation methods).
Emerging from Greek Mythology, the werewolf is a person who changes into a wolf by means of magic or by being placed under a curse. Most of the time, this transformation is brought on by the appearance of a full moon. It is believed that the only way to kill a werewolf is with a silver bullet.
Werewolves in Supernatural
A person who shapeshifts into a wolf or wolflike creature, either by using magic, or after being placed under a curse. The idea of transforming during the appearance of the full moon was an idea that was picked up by fiction writers. In popular culture, a werewolf can be killed if shot by a silver bullet, although this was not a feature of the folk legends. The name most likely derives from Old English wer and wulf.
The first part, wer, translates as "man". The second half, wulf, is the ancestor of "wolf". An alternative derivation of the word has the first part coming from Old English weri (to wear), making the full form in this case: wearer of wolf skin.
Historical legends describe a wide variety of methods for becoming a werewolf, such as the removal of clothing and putting on a belt made of wolfskin, rubbing the body with a magic salve, drinking water out of the footprint of the animal in question, and drinking from certain enchanted streams. According to Russian lore, a child born on December 24th becomes a werewolf. Folklore and literature also depict that a werewolf can be spawned from two werewolf parents. Becoming a werewolf by being bitten by another werewolf is common in modern fiction, but rare in legend, in which werewolf attacks seldom left the victim alive long enough to transform.
Werewolves are humans that transform into wolf-like creatures under the influence of a full moon. The infection and resultant affliction is commonly referred to as lycanthropy. When they are in wolf-form, they appear human except for their yellow eyes, fangs, and claws, and they use their superior abilities and enhanced senses to hunt humans and eat their hearts. They do not remember transforming or any of the details of what they've done as a werewolf once they return to human form, but it seems that whatever subconscious desires or fears they feel as human translate into action when they are werewolves. 
The only confirmed way to kill a werewolf is by piercing its heart with Silver. An entry in John Winchester's journal posited that a werewolf could be cured of lycanthropy by killing the werewolf who infected him or her, but this is disproved by Sam and Dean, and the fallacy of the theory is in fact well known by other hunters, such as Bobby. When they are killed in werewolf form, they revert back to their human form.
After the Apocalypse is averted, it seems that werewolves no longer transform only during the full moon. Also, Crowley reveals that there is an Alpha werewolf, but as of the year 2010 he has not been located.
Pureblood werewolves are different than other werewolves. The closer they are to the Alpha werewolf in generations, the more they can control themselves. These werewolves can transform at any time, their human side has more control in wolf form and they can chose to feed on animal hearts instead of human hearts, but once they get a taste of a human heart, it is nearly impossible to resist the urge to feed on humans.
Powers and Abilities
- Have superior strength and agility.
- Have elongated, sharp fangs and claws.
- Have enhanced sight and smell.
- Can infect others with a bite so that they turn into werewolves themselves at the next full moon.
- Silver. Piercing a werewolf through the heart with silver will kill it.
- Vamptonite. Edgar said that vamptonite would kill werewolves along with vampires and ghouls.
- Dismemberment. Kate was able to kill Brian Wilcox by ripping him apart.
Sam and Dean haven't encountered a werewolf since they were young, and, when they come across a series of deaths they suspect are caused by a werewolf, Dean is excited for the hunt. In a cruel twist, the woman they begin by protecting, Madison, is a werewolf herself. In werewolf form, Madison has canine-like teeth and claws, as well as enhanced strength and agility. She does not remember anything of her wolf-time activities after she reverts to human form.
After tying her up, Sam learns that she was recently bitten by a "mugger" in the same area where their werewolf's victims have been killed. Sam is convinced that the mugger was actually a werewolf and, because information in John's Journal suggests that killing the werewolf who 'sired' her may cure Madison, they postpone killing her until they find her sire. Dean goes hunting and finds Madison's neighbor Glen, who in his werewolf form has been killing prostitutes (possibly due to his religious beliefs). Dean shoots Glen with a silver bullet, killing him.
Madison doesn't turn into a werewolf the next night, despite it being a full moon, so they believe her cured. Sam and she share a passionate interlude, but when she falls asleep the next night she transforms again. Seeing no other solution, Madison begs Sam to kill her, and he reluctantly shoots her with a silver bullet.
In this episode, the Winchester brothers begin their supernatural investigation by looking into a vampire attack. However, the next victim seems to have been attacked by a werewolf. They are confused until they learn that they are dealing with a shapeshifter who disguises himself as classic horror movie monsters, including Dracula and the Wolf-Man.
In an essay he writes about his summer vacation for his English teacher Mr. Wyatt as a kid, Sam mentions hunting a werewolf the previous summer with John and Dean.
- Sam: So, we know that werewolves are basically id gone wild, right? I mean, whoever they hate, they kill when they wolf out.
Crowley and the Winchesters suspect werewolves are the culprit behind a series of deaths where the victim's heart has been ripped out. Sam mentions that werewolves no longer only change on the full moon and relates that "Samuel and I ganked one about six months back on the half-moon." It is revealed that it is not werewolves responsible but Skinwalkers, which Bobby tells Sam are cousins to the werewolves. Like the werewolf, a skinwalker can be killed with silver, eats its victims hearts, and can turn other humans with a single bite. However, skinwalkers are not bound by the moon cycle and can change at will, taking the form of everyday domestic dogs.
Sam and Dean investigate a mysterious death in a college town that turns out to be the work of a pureblood werewolf who is a college professor in town. The professor, being a pureblood, had been able to control himself and was eating animal hearts instead of human, but gave into his urges and ate a human. Sam and Dean track him down and kill him to which he thanks them, but find a camera in his office. Tracking the camera back to Brian Wilcox, they find a movie put together by Brian and his friends Michael Wheeler and Kate that depicts how Michael was bitten by the professor in an attempt to get a scapegoat for when Sam and Dean arrived and his transformation into a werewolf. It follows through Michael killing another young man and eating his heart, the three listening in on Sam and Dean discovering the nature of pureblood werewolves and Brian discovering the professor is the werewolf who turned his friend and confronting him for answers and to get him to bite him. The movie contains the professor’s explanation of his activities and Brian returning home where he kills Michael and tries to get Kate to join him as a werewolf and fall in love with him. Kate kills Brian and finishes his movie, leaving it for Sam and Dean along with a message that she plans to control herself and only feed on animal hearts. Sam and Dean, rationalizing that she hasn't harmed anyone human yet and may not, decide to give her a chance but agree to kill her if she starts feeding on humans.
Werewolves in Fandom
- An list of SPN and SPN RPF werewolf stories
Werewolves in Lore
The ability or power of a human to transform into a wolf. There is also a mental illness in which a patient believes he or she is, or has transformed into, an animal and behaves accordingly.
A werewolf, also known as a lycanthrope (from the Greek λυκάνθρωπος: λύκος, lukos, "wolf", and άνθρωπος, anthrōpos, man), is a mythological or folkloric human with the ability to shapeshift into a wolf or an anthropomorphic wolf-like creature, either purposely, by being bitten by another werewolf, or after being placed under a curse. This transformation is often associated with the appearance of the full moon, as popularly noted by the medieval chronicler Gervase of Tilbury, and perhaps in earlier times among the ancient Greeks through the writings of Petronius.
Werewolves are often attributed superhuman strength and senses, far beyond those of both wolves and men. The werewolf is generally held as a European character, although its lore spread through the world in later times. Shape-shifters, similar to werewolves, are common in tales from all over the world, most notably amongst the Native Americans, though most of them involve animal forms other than wolves.
Werewolves are a frequent subject of modern fictional books, although fictional werewolves have been attributed traits distinct from those of original folklore, most notably vulnerability to silver bullets. Werewolves continue to endure in modern culture and fiction, with books, films and television shows cementing the werewolf's stance as a dominant figure in horror.