Yeah, I agree with the suspicion that Cash is the one, at least based on the description.
But I'm not sure about Apocalypse, because Kayla could have blocked Frost, since she's a telepath, and it's not far from that to hypnosis... although the studying seems strange. They could have had two people come, look at First, they hypnotized, and then they studied.... that's quite logical, in my opinion.



