I don’t know the details of the crossover, but this author does these brief encounter fics particularly well, and this is another nice example.
Anita Blake November 10, 2009
An interesting and amusing series of drabbles, one for each Doctor encountering Anita. Again, I don’t know the cross, but still enjoyed the ride.
Having read the above fic first, the tagline made me smile (The Doctor has met Anita Blake before. Ten times, okay…) A more conventional approach and very well done also.