Parasite demon

Parasite Demon is a demon species. They have the appearance of reptilian humanoids due to their green and scaly skin, red eyes, pointed teeth and ridges at the back of their heads. Even though capable of speaking, Parasite Demons do not have tongues.

Merl was a member of this species.

Appearances

 * "Judgment"
 * "Blood Money"
 * "The Thin Dead Line"
 * "Blood Money"
 * "Heartthrob"
 * "That Old Gang of Mine"