Still a good story, but after re-reading Jean's internal monologus leading up to her transformation, it's hard to fit this into the later "it wasn't really Jean, it was the Phoenix Force!" retcon. So are we to now believe that she was under a double influence (Mastermind's and the Phoenix Force) when she crossed over to the dark side to revel in cosmic power? In other words, was Jason Wyngarde actually manipulating the Phoenix Force which had taken up residence in Jean's body/consciousness, while Jean herself was just sitting in a back room of her mind somewhere? Hmm.