Original Art Sundays # 38: A Private Myth, p. 10

Here's the next page of the Magnum Opus. The plot thickens (or, depending on your opinion of the final product, congeals).

I really like the fist panel. The second panel is OK. The third panel works fairly well but could use some harsher lights, I love the shadows in the last panel, but the pose of the turning figure is awkward as all get out.
Who's in the mysterious photo?
What does it have to do with Catherine?
Pieces of the puzzle will be provided next week!