Dr. Sullivan - funny how Dr. Sullivan was mentioned in the last episode after years? Coincidence? I think not
Avery drake (spencers twin) - okay we've seen how much Spencer's personality changes so I wouldn't be suprised if her twin was A (also her mother is a twin so more of a chance of Spencer being a twin too)
Mike - just for the plain fact we haven't seen him since season 5, where's he hiding at? Its not a good sign when a character is too quiet for too long
