No new posts yet so I guess I'm the first right now....
I love this movie and hope more folks here love it too. The IMDB board for this film was quite active.
I haven't read it yet but I had heard that in the book this film is based on, Mark is Magnus and Lily's half/step brother.
In the film he doesn't seem to know who Lily is when she and the psychic come to Julia's house for the seance.
I had always thought that he was just a close friend of Julia.
Ok...... I have started things off. I hope more fans of the film will follow