Geneva has got a job as a music teacher at the High School. Mark tries to show her the ways around the school. They are getting a new principal and the rumour tells that she loves to fire people. It turns out to be Mark's sister's best friend, P.J. Moore. She says that Mark is the kind of teacher she hates. Mark's schedule includes Driver's Ed. and he's not very happy about that. Mark drives the Driver's Ed. car home. Darnell takes it for a ride without Mark's promission. He accidentally hit a lawn mower and gives the owner Mark's name. The owner is going after the school. Mark dresses up as a woman to play the role as the principal when they man is coming to the school. He wants a date with ""P.J."" (who Mark is pretending to be) at a karaokee bar. When they meet there, Mark gets him to sign the settlement. Then the real P.J. shows up. Mark tries to hide from her, but after a while she sees him. She realises that Mark really loves teaching and doesn't fire him.

Mark works as Santa in a mall.

Mark is assigned to a private school by P.J. to teach American history. The school is nothing like what Mark is used to. Everyone is properly uniformed, preppy, and all white! He ends up teaching them all about black history ""from slavery to Soul Train"".

Mark is turning 30. Vanessa and Geneva decides to arrange an over-the-hill party. Tyler discovers a strange lump on Mark. Mark goes to the doctor to have it tested. A misunderstanding leads to Mark thinking that he's going to die because of the lump. He goes sky-diving and gives away his stuff. He even gives most of his money to Thaddeus to name a park after him.

Mark is dating an attorney named Denise (Lela Rochon). And when Mark tells her how he really feels about coming over to the house unannounced, she then breaks up with him. Meanwhile, the student hold a car wash to raise money for a school dance. Mark receives a court supbeona stating he damaged Thaddeus White's car on the driveway where the students held the car wash. Mark and Denise battle it out. Mark finds out why Denise wants him to meet her parents - it's not because she wants to get married, they're just big NBA fans.

Mark catches Vanessa lying on the phone to Thaddeus. They make a bet. So, when P.J. invites them to her fund raiser thay can't get out of it. P.J. wants Mark to take her niece Luttie to the fund raiser, and that's the way it goes since Mark can't lie about not having a date. Tyler falls in love with Geneva.

Vanessa wants to show Geneva how to have a good time. Geneva tries to hit on a man who turns out to be a police officer. He mistakes her for being a prostitute and arrests both her and Vanessa.