This article is from the Pratchett Newsgroups FAQ, by Orin Thomas firstname.lastname@example.org with numerous contributions by others.
A television series came along which was based around a wide
eyed Canadian Mountie working as a cop in deep dark Chicago. Many
have noted that similarities exist between the character Frazier
and the beloved Discworld "Dwarf" Carrot. Well Terry's books were
written first so no, he didn't copy the idea. I have no information
suggesting that the creators of Due South are even aware of the
adventures of Carrot. So it is likely that they didn't copy either.
If they did, I missed the episode where Frazier fought the Dragon,
or the one where a crazy man with a Gonne tried to make Frazier
mayor of Chicago ... and I am sure that the woman at the police
station who likes Frazier is *not* a werewolf.