Martian Manhunter

[Dr Mordrid]

Martian Manhunter is in the January 25, 2007 episode "Labyrinth"

Synopsis from IMDB: Clark is attacked and wakes up in a mental asylum where the attending physician, Dr.Hudson, tells him he has been there for five years due to his elaborate fantasy that he has alien superpowers. In this new world, Martha is married to Lionel Luthor, Chloe is deemed insane and Lana chose Clark over Lex. Lana begs Clark to agree to Dr.Hudson't treatments so they can be together, but when a fellow patient named John, A.K.A. Martian Manhunter, tells him the good doctor is actually a Phantom and he needs to kill him in order to return to reality, Clark must make the toughest decision of his life.

By "Phantom" I'm presuming they mean one of the escaped Phantom Zone prisoners Clark accidentally released when he escaped earlier in the season.

Manhunter will be played by Phil Morris, whose father Greg Morris played the tech specialist in the original Mission Impossible TV series. Phil has appeared in several Star Trek versions, Seinfeld, NCIS, voiced Vandal Savage in Justice League.

[Jessterw]

Had a suspicion that was Jonn Jonnz (the Oreos on the Static episode hinted at it). Wonder if we'll only see him looking like a human in this new episode.

[Dr Mordrid]

He'll be mostly human IMO, but in my readings it seems his presence in the hospital is by telepathy. If so then perhaps we'll get a look at the Manhunter himself once Clark "escapes".