Of course there's a Superman! Why shouldn't Iron Man be able to fly in that heavy metal suit? With its post-9/11 metaphor of the threat of dirty bombs and a devastated New York, "Heroes" is set in a real-world universe, where the fantastic is still amazing. Still, politician Nathan Petrelli feels burdened by his ability to fly fast enough to break the sound barrier. His brother Peter's incessant whining about the siblings' special destiny pushes Nathan to retort that his superpower is good only for rescuing cats from trees. Now, c'mon! Who among us wouldn't be thrilled to find out we can fly? When a story is set in reality, flubbing that reality is aggravating. Extended puberty is a popular secondary theme in science fiction/fantasy -- that explains regularly sold out Comic-Cons and Star Trek conventions across our great America. New powers not only make you special (just as you always suspected), you can now postpone the drudgery of being an adult. Not so in "Heroes." Take Webcam stripper Niki Sanders. She's got a sociopathic, freakishly strong split personality "Jessica," with whom she can chat with in the mirror. But she still couldn't get enough cash to keep her technopath son Micah in genius school. And she can't stop "Jessica" from taking over their shared body in Monday's episode and using a high-powered rifle to take out her phase-shifting escaped convict husband, D.L. Hawkins. However, waiting until the next "Heroes"" episode to learn if D.L. phased Jessica's bullet is a