Sam leaps into a University professor who is into more then just literature. He has an unsavory reputation for seducing female students and (apparently) has a collection of some very kinky stuff (alas, only Al gets to see it).
Officially, Sam is here to persuade a student to start up a relationship with a University athlete, rather then becoming another one of the professor's conquests.
However, Sam meets the woman (as a student) who would later become the love of his life. In the original history, Donna left Sam at the alter and -- despite the rules to the contrary -- Sam decides to reunite Donna with her father, based on the theory that Donna the family reunion will ensure that she is not afraid to marry Sam in the future.
One of the big rules at the Quantum Leap project is that the time traveler are not suppose to fix or enhance his or her own personal history. Al reminds Sam of this, and tries to persuade him to stick with the official reason for the leap.
Yet, the love that Sam felt for Donna (which his 'swiss-cheesed' brain remembered) conquers all. With a little --- coded -- help from Al, Sam is fix what went wrong for both students. Initially, Sam is not sure if he has succeed, but in a later episode we learn that Donna did marry Sam.
This is a nice episode. The story forces forces Sam to confront the ethical challenges that stem from time travel and their are a few funny moments with Al.
The "brush with history" -- namely the scandal that brought down President Nixon, is also a nice story element.
My main complaint is that I am not sure how realistic the situation with the professor is. Sam remarks at how the campus atmosphere is much more conservative (for the 1970s) then he would have initially thought.
I am not sure that -- in the real world -- a professor at a private and 'straight laced' University (in the early 1970s) would be allowed to "carry on" with his students, to the point where he got his own closet full of adult toys.
I appreciate that they are consenting adults, but I would assume that (even in the 1970s) the University administration would be worried about potential accusations of sexual harassment or a professor academically favoring students that he is sleeping with.
It is possible that the University administration is ignorant about the situation or just "looking the other way", because the professor is popular or well published. However, it always seemed a little off.