Finished Copper last night. I still recommend it very highly.
However, the way it ends (because of premature cancellation) is pretty deflating. Not depression-inducing like Firefly, but a travesty, nonetheless. Well worth your time. Checks a lot of blocks...period drama...cop show....lots of historical context/references....plenty of whoring and drinking....good acting...it was a bit noticeable, though, that there's few, if any, female characters that are truly likeable...goes for most of the males, too, I guess....lots of flawed folks back then :) If you like Gangs of New York, give this one a try