Luna discovers a link to another world in her fireplace, and calls upon The Doctor to help her.

Also, it may look like I went on Equestria Daily and copied Dashalicious' story called The Fireplace and just changed the name, but no, that was me, Prince Colgate is just my new handle.

Also, I want the world to know that I did Doctor X Octavia first. It's just the part with her hasn't reached ED yet.