Arkham Knightmares Season One Episode Five: Can't wake up

After leaving the witch behind, Mark was hoping to wake up from the strange and tenebrous nightmare that's consumed him. Unfortunately, his dreams of the waking world are dashed as he's thrust into another extended bout of terror. Why won't the lights work, why is it always so dark, and why are the people here all phony imitations? Indeed, Mark had best find the portals he's been tasked with closing quickly, because the strange human doppelgangers known as "Pretenders" are becoming more and more aware of his presence. Worse yet, Mark just caught wind of his own reflection in a nearby mirror, and he can't believe what he sees looking back at him from the glass...