Re: Quantum Leap: what if it had been made 20 years earlier?
In the very best possible version that could have been made then... the 'kisses with history' would have the central aspect of the series's format. Every leap would have had to have had an easily explained impact on keeping history 'on track' - if Sam jumped into a local doctor, he'd deliver Mrs Truman's baby Harry; if he was a sailor on a World War 2 patrol boat, he'd be instrumental in his skipper JFK's survival after its sinking... etc.
"Some days are better than others. They say that where I come from."
"Loudly, I imagine, on the day you left."
(Blake's 7 - Rumours of Death)