While it’s possible that Cinemax could’ve possibly combined The Knick and Quarry for a back to back return down the road to increase viewership, Outcast (which has set viewership records for the network) is starting its Season 2 April 3rd.
One would think if Cinemax was trying to bring back The Knick for a Season 3, bringing it in after Outcast would’ve been the way to do it.
On the other hand, Outcast (developed by The Walking Dead creator Robert Kirkman) was renewed for a Season 2 before its series even began.
Speaking of those other shows, Quarry is similar to The Knick in that it had a favorable Season 1 from critics, and a willingness to continue, but hasn’t received word about the future since its October finale.