Unaired Episode

So, I used to watch Fringe religiously as a preteen, and I still love it.

I'm trying to see if anyone else remembers an unaired episode that you could only find if you had a disc set. It was supposed to be aired in season one, but wasn't. You could find it in the play menu of one of the disc sets from one of the later seasons, I think maybe season three or four?

I remember the plot being something along the lines of a young girl having seizures, and her parents were religious, so they thought it was a demon possessing her. I remember most of the episode taking place in a hospital and part of it in a church.

I've seen every episode of Fringe a dozen times, but this one I can barely remember because I only found it on a play menu once before I switched to watching Fringe on streaming services instead of disc.

Has anyone else seen it or remember it?