Originally Posted by Mjölnir
It's also not an acceptable answer. How does he manage to replace Odin? It would very quickly be noticed if there was two Odins walking around in Asgard, especially when Thor comes back to talk to his father. It's obvious that something must have happened to Odin.
not as long as Loki can keep the illusion that this imprisoned high security person in the dungeon is someone completely different