(not sure if this is the right section or not)
Up until now most if not all examples of time travel that I have seen ended badly in one way or another. Then I started watching Quantum leap and was almost ready to declare that the trend had been broken and that it could indeed have a positive outcome. The hero of the show Dr. Beckett, strives to put right what once went wrong and often accomplishes a lot of good deeds. But then I got to the final episode, which leaves the answer as somewhat unclear..