COREY: Transformation complete. Corey is 100% the dull and hilariously bland character that makes him one of the best TV show protagonists ever. One of my favorite moments is in the 2nd Episode "Hair Today, Goon Tomorrow" where he fears he is never going to get out of his awkward unattractive stage and imagines himself as the Elephant Man.
SHAWN: By the end of this season we see that Shawn has become the intelligent character that Feeney and Turner always knew he was. It's good to see him move past the regular angst of the last few episodes. He's also become super self-aware about his existence as a TV character. There's 3 or 4 episodes that breaks the 4th wall however Shawn is the only one who is aware of it.
TOPANGA: Topanga is still the same character from Season 3 but since getting her haircut and spending all her free time with Shawn and Corey she's become more laid-back and a little more girly (focusing on shopping and compliments more than ever before).
MR. FEENEY: Mr. Feeney continues to educate our main characters but this season more of his "lessons" takes place outside the classroom. There's at least 4 "back porch" conversations that will make you bite a knuckle, fight back a tear and choke up a bit.
ERIC: Eric is now completed his transformation as a complete idiot. However by the end of the season he has proven that underneath the idiocy he may also be most intelligent of all the kids.
MORGAN: Morgan remains a minor character in the show still. She's pretty purposeless and will be for the rest of the series.
MR. AND MRS. MATTHEWS: Nothing new with them.... still
MR. TURNER: Mr Turner is a minor character at best at this point. He's no longer the cool young biker teacher. In fact for no explainable reason he dresses like Feeney did in Season 1. He does get into his accident at the end of this season. His fate is left kinda in limbo.
Season 4 starts off strong with the comedy and while it never stops being funny by the mid-season it becomes more of a dramatic focus. There's a ton of hilarious and classic episodes. This is the season that represents everything that makes series the beloved gem of the 90's it is now.