read this article this weekend
pretty interesting but it has spoilers
they let you know when they are coming so you can skip them
http://www.ew.com/ew/report/0,6115,1553770_3_0_,00.html
i like this quote:
'We tried to learn from the pitfalls that other shows had fallen into,'' says Kring, citing Lost, 24, and Desperate Housewives. ''We sort of made a pact internally that we weren't going to be the show that made you wait for stuff.'' Of course, that does leave Heroes vulnerable to another potential pitfall: running out of story to tell.