where it is possible to time travel, it exchanges body and mind, but some of the host mind gets left behind. Then the leaper would have to fix anything that went wrong in time, not sure what would happen should the leaper fail. Interesting show.
[link|http://www.finifter.com/quantum-leap/|http://www.finifter.com/quantum-leap/]
[link|http://www.scifi.com/quantum/|http://www.scifi.com/quantum/]