Supernatural's Mark Sheppard to guest-star on Doctor Who!

Seems like Mark Sheppard is in every Sci-Fi series to hit television these days. From Battlestar: Galactica, Chuck, Warehouse 13 and most recently as the demon Crawley on Supernatural.

Now word is that Sheppard is guest-starring on the upcoming series 6 of Doctor Who; it's believed he will appear in the two-parter series opener penned by Steven Moffat that will have the cast and crew partly filming the episode in the US this November.

The cat was let out of the bag during this weekend's sci-fi convention ValleyCon 36 when an announcement was made that Sheppard had to pull out of the event.

"We had just booked Mark's airline tickets a week ago when less than 12 hours later he got the dream job of any kid who grew up in England. He [has] landed a huge role in the new Doctor Who."

I'm just wondering what ''huge role'' Sheppard will play, but it will be great to see him alongside Matt Smith, Karen Gillan and Arthur Darvill. And who knows, maybe he'll even get to be in the TARDIS!

Series 6 of Doctor Who is set to air in 2011.

[via Digital Spy]