Quote Originally Posted by Sporeegg View Post
I know Grimm's Wörterbuch - a dictionary - has defined Doppelgänger as someone who looks exactly like you and takes your place but I don't know of any Grimm's fairytale that uses a Doppelganger. Did D&D just put the stories into a monster?
Probably - possibly taking inspiration from sci-fi as well as fantasy - "Kill/Capture & Replace" was very common in science fiction, and the D&D monsters look rather like "Greys" "Roswell Aliens" etc.