Films: The Exorcist 3 (1990)

Alias: James Venamun, Patient X (Father Damian Karras)

Type: Mystical

Location: Haunted Home

Height/Weight: That of an average human.

Affiliation: Evil

Summary: I know that that second Exorcist film left a bad taste in most people's mouths. But you'd be shocked to find that the THIRD film was capable of standing on its own two feet. And it all can be trailed to the one known as Gemini.

History: James "the Gemini" Venamun was dead. That serial killed had been executed more than a decade ago. But now, people are turning up dead, their bodies bearing the same marks of the Gemini killer. As it turned out, James' restless spirit teamed up with Pazuzu, who was looking for a victory after the disaster with that little girl. Now, he's possessed the dead body of Father Karras, and is forcing him to watch as he massacres everyone in his path.

Notable Kills: You don't want to hear his description of what he did after he paralyzed that guy. It's enough to make a doctor want to strike him.

Final Fate: After the Gemini killer’s havoc, Karras' spirit manages to shine through, and demand that someone shoot him. Someone does, banishing the Gemini and Pazuzu from his body.

Powers/Abilities: Possession.

Weakness: Exorcism, killing the host body.

Scariness Factor: 4-Forget Pazuzu. The Gemini killer didn't even need him. All he needed was to be a spirit, have a demented mind, and generally promise pain and misery wherever he goes.

Trivia: -The Gemini Killer was among many inspirations for the infamous real-life serial killer, Jeffrey Dahmer, alongside Emperor Palpatine.

-The Gemini Killer was played by Brad Dourif, whom you might remember as the voice of Chucky from the "Child's Play" franchise.