But as this graph suggests, I don't think current viewership would've justified or sustained a fifth and final season.
But let's say for a moment that HBO did renew for a 5th season. What do you reckon viewership would look like? Did HBO make the right decision? Or was there nothing left to salvage?
The viewership reflected that the story went off the rails after season 2. If I were HBO I couldn't justify a 5th Season either.