I first watched Quantum Leap back in about 1995 when I was aged about eleven or twelve and it remains one of my all time favourite TV shows to this day. Following a time travel experiment that went wrong each episode sees Sam (Scott Bakula) 'leaping' into the body of someone from the past in order to change something that went wrong in their lives. Until the final episode we never find out what is causing this to happen but to be honest Quantum Leap was never really about the science fiction.
What made Quantum Leap special was the way in which it dealt with real life issues such as racism, war or relationships in such an interesting and honest way. I have since watched this show from start to finish again both on TV and later on DVD and it is as enjoyable now as it was 15 years ago.