If you don't want to know the circumstances surrounding Saturday's entry in this slideshow, then don't read any further...
[spoiler]Saturday's quote:
Ep #694 (1969) - Prof. Stokes - 'Amy and David MUST NOT be left alone for one minute tonight.'
From "Robservations 10/18/02 - #694/695 - Roger Becomes a Believer"
Stokes keeps trying the door, then leans his back against it, staring at the fire spreading around his room. Quentin's image continues to laugh at him. Stokes, desperate, grabs, a candlestick and smashes the mirror, covering his eyes to protect them from the class. Miraculously, the fire goes out. Stokes stares around himself, asking for a moment, when Roger knocks at the door. Stokes assures him, I am NOT all right. Roger jiggles the doorknob. Stokes lets him in. I heard laughing, and a crash, says Roger--the mirror! I just received an answer to my ultimatum, says Stokes and I'm not surprised--if I were a ghost, which I will be someday, I wouldn't let words drive me away from his room, not even the words of the exorcist. Roger insists there are no ghosts and begs Stokes to tell Liz the spirits are gone (why should he need to, if there ARE no ghosts?). That's too dangerous, objects Stokes--Amy and David can't be left alone tonight. Roger, following him out of the room, says no, Professor, you aren't to leave the room until you agree to keep silent about this latest trick of your imagination.
[/spoiler]
The Robservations paraphrases the quote but references it well...
And this is the second quote from this ep. The first (Prof. Stokes - 'We MUST examine every possibility very closely as soon as we make sure Amy Jennings is all right') was back on July 6th of 2021.