It is American, from Showtime. M.Di Venuto, if you have digital television it is on TDT Monday at 9:30, I'm not sure if Southern Cross have scheduled it (that applies for Tasmania only, the timeslot is the same on Ten, but you don't need to have digital).
I only initially watched it because The Office is on after it and I found it very odd at first (I couldn't make any sense of the plot, but after a few episodes it made sense), but it has grown on me and am now hooked.