Oh man, the storyline with Shawn was side splitting funny. The Cory and Topanga one was...well, I guess they had to insert it to make the rest of the episodes work.
And Eric...well, we can always count on him for a good joke now can't we. My favorite was:
Jack: "Wait a minute, he's handcuffed"
Eric: "That little devil!"
And at the end...when they all walk out of the boathouse and Eric walks back to get a set of handcuffs, just classic.
I remember those girls too, Jennifer was part of a really funny episode back in like season 4 and Dana was part of a few episodes back in like season 3. I think I vaguely remember Libby, but I'm not sure when she made her first appearance.