For further info.... 

Ello there, the Doctor here... Here's a link concerning the * if you hadn't already checked out the TCW talk page. It's from a pretty good episode too, although the image on the episode article here is from In a Mirror, Darkly... That rather bugged me. Anyways, thanks for pointing out a possible inconsistency in the dimensional drift of the article. These things always need improving...
Many happy returns.