Donald P. Bellisario, the creator of Quantum Leap, served with Lee Harvey Oswald in the US Navy in the late 1950s.
Sam: (as Oswald) Carlos, do you wanna hit me?
Al: He's doing exactly what Oswald did!
Carlos: With pleasure.
(He is about to punch Sam)
Cop: Y'all freeze! Hands up against the wall! Up against the wall! Shut up!
Al: Sam, can you hear me? It's the ninth of August of 1963. There's only three months until the Kennedy assassination Sam, and this leap is bringing you closer! If you leap into Dallas on November 22nd and Oswald is still in control, you won't be able to change anything Sam! You gotta fight him. Fight him Sam!
Sam: My name?
Al: Dr. Samuel Beckett!
Sam: (as Oswald) My name is Lee Harvey Oswald.
(He leaps out)
Oswald: String theory?...It closed the conceptual gulp between relativity and quantum mechanics. It postulates that subatomic particles are not points, but strings, about one planck length long. The rate at which strings vibrate can generate the properties of all known particles....Huh? How did I know that?
Oswald: I admire the President very much!
Al: You admire him but you're gonna kill him.
Gooshie: Then Oswald would have to be the sole assassin.
Al: That's right!
Gooshie: No conspiracy?
Al: No. Just one angry, envious man who wanted to propel himself into infamy!
Gooshie: One lone man?!
Al: I know it's more comforting to believe in plots, because if Kennedy could be killed that easily, by one sicko, what hope is there for the rest of us?
Gooshie: Admiral, what are you gonna do?
Al: To try and find the truth.
(Al enters the Waiting Room)