Farewell for NBC Heroes: No Season 5
NBC Heroes was canceled and other than possible talks with Tim Kring of a movie to wrap up the series there won't be another episode on NBC.
Dragon Blogger Review of Heroes Season 4 Season Finale
The Heroes collectively manage to stop Samuel from causing a mass murder and finally are revealed to the public after Claire exposes herself.
Dragon Blogger Review of Heroes Season 4 Redemption – Episode 16
The episode before the Season Finale has Sylar and Peter trapped together for months in Sylar's mind trying to work out their differences and free themselves.