I like this one to an almost frightening degree. (Though Doctor Jack isn't bad on his own. And there's a brown spot on the very bottom of the lip, that I didn't see in person but noticed once I was home looking through the photos, which ruins it slightly.) It's weird because the flower isn't terribly exciting or colorful: this same general coloration on a Phalaenopsis wouldn't excite me at all, but put it on a slipper orchid and I'm all hello, nurse!
(I am large, I contain multitudes.)
The genetics here are pretty straightforward: Paph. delenatii contributes the overall shape, and Paph. Doctor Jack adds the spots and removes the pink lip.
Looking up the ancestry of Paph. Doctor Jack is left as an exercise for the reader.