I hadn't realised that you were adding another chapter so I added mine but I like yours so we can ignore mine.
I like the idea that she's using proper hypnosis on Biff rather than suggestions. I think in normal circumstances Biff would be hard to change but the hypnosis makes it easier.
It'll be interesting to see if Karyn has a visit from Miss Fine although thinking about it I quite like the idea of her being changed without seeing Miss Fine if you get my meaning.