Khan worm

The Khan Worm, named by Dean Winchester, is a new type of supernatural creature recently created by Eve, Mother of All. There is no official name for it, as it is new, and humans have not given it a proper name.

It is unknown if there more specimen, as it was not detailed in the information given in the only episode it appeared so far, "...And Then There Were None".

Characteristics
The Khan Worm, as the name suggests, is a worm that enters into people's head through their ears and controls their actions. Dean says it is like a Khan Worm on steroids, and also refers to it as a "twelve inch long herpe."

Appearance
This creature appears as brown worm, or caterpillar. However, it has the ability to "possess" humans by entering their heads. They also have the ability to pass unnoticed from person to person, so it can kill its host as it pleases.

Story
Created by Eve, she planted it inside a trucker, who goes on to kill his family. It then passes to one of his co-workers who kills 12 people. While investigating the murders, it infects Dean who kills his cousin Gwen Campbell, and then infects Samuel, and finally Bobby who kills Rufus while possessed. While possessing Bobby, it tells Dean and Sam that it was created by Eve, who intends for supernatural beings to take over the world. It is then electrocuted to death by Dean while still inside Bobby, who manages to survive the experience.

Known Abilities
It that can enter a person's body through the ear and control their actions. While possessing a person, it greatly enhances the strength of its host. The hosts retain no memory of the time when the Khan Worm was controlling them.
 * Possession
 * Enhanced Strength - In its true form, the worm is very miniscule and weak, however once in a host, it magnifies the strength of its host greatly.
 * Super agility - While without a host, it's actually quite agile, being able to scurry around very fast.

Weaknesses

 * Electricity - when the Khan Worm was electrocuted it caused it pain and then caused it to die, when it was inside Bobby

Trivia

 * This is the first of two supernatural creatures that Dean has named, the other being Jefferson Starships.
 * The name "Khan Worm" is a reference to the movie Star Trek 2: The Wrath of Khan, specifically the scenes involving the parasitic Ceti Eels. Like the Khan Worms, the Ceti Eels are worm-like parasites that burrow their way into the victims' ears and take possession of their minds.