Go to CBC.ca. CBC is the originating network. DaVinci's Inquest ran for seven seasons on CBC, DaVinci's City Hall was an attempt by the producers to inject some new life into the series....didn't work, it only lasted one season.
BTW, if you like the DaVinci shows, you might also like "Intelligence", by the same producers, with some of the same stars. It's set in Vancouver also, same kind of dark, gritty format; but was cancelled before its time, only 2 seasons.
As far as I know, both shows are available in their entirety from cbc.ca