Little girl in Jack’s holding tank?

Reader Sthnbelle points out that on, here’s a mysterious picture of a little girl in the holding tank with Jack. You can see it in’s Photo galleries. I’ve posted a copy of the picture here. You can see it for yourself by clicking the link above, going to Season 3, and go to picture #33.

I sure don’t remember seeing that last night, and the only thing I can come up with so far is that it’s a picture from one of the upcoming episodes. Any other thoughts?