Parkman tried to shoot him, he stopped the bullets. Although he wasn't invincible, just a gun wasn't going to do the trick. However, you're correct, technically a gunshot could kill him. It's probably been addressed a few times, but why couldn't Hiro just stop time and then kill Sylar?
I know you're referring to the comic from Back to the Future, and I know the scene in this weeks episode where they showed the comics, but I didn't notice that title. Cool none the less.
Hmm, I guess we have to hope that some of the things they've shared in the graphic novels will be shown in the series. Because while they are neat, I think some may be important to the show, or at least help out while watching. Learning how Hiro got his love for comics and his name is neat...
I know where you're coming from. I kind of feel/felt the same way. However, they are only about 5 or 6 pages each of basic comic book dialog, so there isn't that much time to be invested in reading them.