Keith: You thought I was an impostor!
Jason: No we didn't.
Keith: Syd, did.
Keith: She just remembers you differently.
Keith: I remember her differently but I don't see you making her take a DNA test.

If that's Keith, then who is the psycho living in his room?

Quinn

Mike: You know you both behave like you've gotten nothing to lose because you lost everything.
Nikki: We did lose everything.
Mike: But you got it back! I know you've been living with this wound. And it's affected you. I get it. But Keith is back. It's over. You want to review my behavior, fine, but you both need to review yours as well.

Nikki: We're here to help, that's all.
Miguel: You can't help.
Nikki: We don't know that, right?
Miguel: No one can.

C: Are you okay? You look like you've seen a ghost.
Kemi: Because I have.

Alert: Missing Persons Unit Season 1 Episode 5 Quotes

If that's Keith, then who is the psycho living in his room?

Quinn

Keith: You thought I was an impostor!
Jason: No we didn't.
Keith: Syd, did.
Keith: She just remembers you differently.
Keith: I remember her differently but I don't see you making her take a DNA test.