Here’s the official spoiler:
Mark your calendar, February 2, 2009 after Superbowl on NBC. 
1: A Clear and Present Danger
2: Truth and Blood
3: Building 26
4: Cold Wars
5: Exposed
6: Shades of Gray
7: Cold Snap
8: Into Asylum
9: Unknown
10: Unknown
11: Unknown
12: Unknown
There will be 12 episodes for this season but the final four episodes for this season was not yet revealed.
An excerpt from The Hollywood Reporter, here’s more of what Bromstad said:
“‘Heroes’ is very secure,” she says. “We have a great relationship with Tim Kring … what’s important is we never lose sight of being responsible in production. And television is about the characters and the writing, and we want to make sure that that show is on track. But very secure. I think that what Tim is interested in doing is getting back to the core of the show and that it’s these ordinary people with extraordinary powers and that they may have taken on too much in terms of characters and multiple storylines.”
