The $10 t-shirt deal of the day over at TeeFury today is a mash-up of Harry Potter and Doctor Who called “Whodiwasi” by artist jkilpatrick.

The sale began at Teefury today, Tuesday, August 9, 2011, at midnight EST, and will continue for 24 hours from then, and once it’s over, it will not be sold on the site anymore.

The t-shirt is available in men’s and women’s sizes in navy blue for $10 each.

Here’s what the artist has to say about this design:

I haven’t seen any new Dr. Who episodes on ScyFy (but my friend Rog says it’s supergood). So to me, the 4th Doctor is the most identifiable, I guess because he was on the show when i was a kid. The scarf always struck me as a little nutty. So I wanted to do something to play off these characters with memorable scarves.

What do you think of this design?