Official: NBC cancels 'Heroes' -- The Live Feed | THR
In the end, given the fairly high cost of the drama, the show's consistently declining ratings and the number of new hour-longs coming to NBC next season, the network decided the UMS-produced series wasn't worth an additional season. Sources say the network is still leaving the door open to conclude the show with a special or movie.
Now bring back THE UNIT!!!! (oh wait, that's CBS...still, bring it back!!)