My favorite OGQL episode is Honeymoon Express. It's got the effects of the leap shown (one of the very few examples) on screen as well as disagreement between Sam and Al, Not that disagreement is a key point, but it helps to see the two show different sides and opinions, even though both are dedicated and super competent. It's the key episode fopr someone unfamiliar with the show to get a great idea of what it is all about.
Points to The Leap Back for the project and Donna scenes (with her asking to see a star with light far enough away for her to see it at the time Sam is currently at). And Al's leaping!