So I am now partway through downloading the entirety of Frobisher's run in the Doctor Who Magazine comics, because also_not_a_pipe made me realize something:

If Ray from dueSouth is actually a Time Lord who came to Earth as a refugee from the Daleks and, for reasons which don't need exploring at this juncture, remained as a cop in Chicago --

Then Diefenbaker is obviously a Whifferdill. See, he's an animal, but he's of at least human intelligence, and he changes what variety of animal he is from time to time, and he's a detective, *and* he's named after one of the great men of Canadian history. ... clearly a Whifferdill.

So now I have to read the Frobisher comics too before I write the crossover, but that's okay, because I think it gives me the first beginning of a plot hook for the crossover (and an excuse to use Six or Seven as the Doctor! Yay!)