Okay, so Christopher Lee appears in the guise of a guy with a floppy hat who is I guess is a monster hunter doing an investigation. Then Doctor Muttonchops is doing an autopsy, which involves removing a brain and putting it in a wet jar to make a mixed drink for sober mind flayers.
He then has a conversation with Carla, where we reveal that the Doctor does have gorgon knowledge, and thinks the gorgon has taken human form but he won't explain more until he is Sure.