|Powers and Abilities||Able to control a person's actions after it enters their brain through their ear and enhances the strength of its host.|
|Appearance||Like a slug crossed with a centipede.|
|Episode(s)||6.16 ...And Then There Were None|
Khan Worms in Supernatural
The Khan Worm is a monster newly created by Eve after she is released from Purgatory. Although it looks like a cross between a simple slug and a centipede, it is a self-aware, intelligent parasite that can enter a person's ear and take control over their actions as well as access their memories. After it leaves its host's body, a black, gooey substance is deposited in the person's ear. Other names: Herpe and Sluggo (by Dean). 
Powers and Abilities
- Can control their victims' actions and access their memories once it has entered their body through the ear.
- Increase the strength of the host bodies they possess.
- Electrocution. A current of electricity can stun or kill a Khan Worm depending on its intensity and duration.
Eve originally plants the parasitic creature in the ear of a trucker named Rick, and it goes on to kill Rick's family. The creature then possesses one of the trucker's co-workers, who kills 6 people at the Starlight Cannery. While investigating the murders at the cannery, Dean is possessed and the creature uses him to kill his cousin Gwen. After it leaves Dean's ear, he tells Sam, Samuel, Bobby, and Rufus that it is like a Khan Worm on steroids, and also refers to it as a "twelve inch long herpe." It then possesses Samuel, who is killed by Sam. When Bobby and Rufus resolve to cut open Samuel's head to check for the newly dubbed Khan Worm, it animates Samuel's dead body and fights them. During the struggle, Samuel's body is thrown back against exposed wiring and electrocuted, and the Khan Worm is stunned before retreating to possess someone else. The hunters are unsure who is possessed and so shock each other one at a time to try to reveal the Khan Worm. While possessing Bobby, it quickly stabs and kills Rufus, but Sam and Dean overpower him and cover Bobby's ears and nose with duct tape so that the Khan Worm cannot escape. It tells them that it doesn't have a name yet because it is a new monster recently created by Eve, who intends for supernatural beings to take over the world. They electrocute Bobby until it falls out of his ear, dead.
- Dean and Bobby both refer to it as the Khan Worm because it is reminiscent of the Ceti eel from the Star Trek movie The Wrath Of Khan which after entering through the ear, wrapped itself around a person's brain stem making them susceptible to suggestion, and eventually causing madness. It was referenced also in the reboot Star Trek movie in the form of the Centaurian slug which also entered through the ear canal and made people speak the truth.