You don't need powers to be a superhero. Batman proved that a very long time ago. The key is to actually do something. Even with powers, the vacillating characters on Heroes are less than heroic.
It's extremely difficult to do a time travel show well. Doctor Who isn't a time travel show. It's an adventure show that uses time travel as a plot generator, much like Quantum Leap was. The difference is rather huge, compared to a drama that uses time travel as a plot-revelator and a problem-solving tool, such as Heroes. In the former, fudging the rules in the name of a good story is alright, even preferable. In the latter, the rules must be totally consistent or the story breaks. Even Bill and Ted eventually figure out how absurdly powerful a tool unrestricted time travel is.
It would be fairly easy to limit Hiro's power by making excursions already part of history. The only problem is that this isn't really possible now because Future Hiro and Future Peter have both changed the past. There needs to be a good reason why Hiro can't just Bill & Ted his way through every problem.
It's extremely difficult to do a time travel show well. Doctor Who isn't a time travel show. It's an adventure show that uses time travel as a plot generator, much like Quantum Leap was. The difference is rather huge, compared to a drama that uses time travel as a plot-revelator and a problem-solving tool, such as Heroes. In the former, fudging the rules in the name of a good story is alright, even preferable. In the latter, the rules must be totally consistent or the story breaks. Even Bill and Ted eventually figure out how absurdly powerful a tool unrestricted time travel is.
It would be fairly easy to limit Hiro's power by making excursions already part of history. The only problem is that this isn't really possible now because Future Hiro and Future Peter have both changed the past. There needs to be a good reason why Hiro can't just Bill & Ted his way through every problem.