Where have all the Heroes gone...

Today I watched some Heroes via Netflix. Why is that show not back on the air? I looked on the NBC website and all it has is the graphic novel. I know I may seem nerdy, I'm not that nerdy. When will it re-start? I am sure that there are tons of people who want to see it back on broadcast television, I am going to try and e-mail NBC and all that, you should too, if you support Heroes. Marcel Out.