A few 100% "Canadian" (or nearly there) shows that have been widely seen recently in the US:

Flashpoint
Rookie Blue
Combat Hospital

Then there are shows that are just mostly Canadian, like the one I recently mentioned from NBC, The Firm.

There is way more Canadian content on US television than British. Some might argue that there's as much (at least partially) Canadian content as there is US if you include production company origins and/or filming locations.