After the day from Hell, Mikey has had enough. With no post-grad plans, he finally figures that he might as well drop out. Now he's trying to make it as a musician, and Parker and friends must intervene to help Mikey see the error of his ways.

Sometimes a bunch of little events occur at just the right time to culminate into one big disaster. This is one of those days, as Musso's review results in her being demoted to teaching home ec, and Dr. Norman Pankow becomes the new principal. When Pankow turns the school into a prison, Parker must figure out how to get Musso her job back.

With the Class of 1970 reunion coming up, some surprising characters appear. not only did Musso graduate then, but Larry's dad, Parker's dad, and the dads of his two best buds. The forerunner of Parker, Mr. Lewis was the resident prankster along with his buddies, and in their day perpetrated the ultimate prank. Now the only evidence of their identities in the prank are about to be revealed as the time capsule will be opened in front of the entire graduating class. Can Parker cover up the crime, or will his dad's legendary episode from years past cause Parker's downfall?

Ms. Donnelly is the definition of coolness as she not only makes class interesting, but she lets her students have fun. When pranks backfire, Ms. Donnelly usually covers for Parker, but this time, her patience begins to falter from the ensuing chaos. The heroic teacher finally resigns, leaving the students to fend for themselves.

Jerry's latest geeky obsession has taken him away from what matters most, leaving Parker and Mikey to get him back on the right track.

Jerry's not acting normal and, as Parker and Mikey get to the bottom of the problem, they learn the motive is Jerry's love of a girl. Parker and Mikey ditch their responsibilities in order to pilot nervous Jerry through his date.

The last confrontation between Musso and Pankow left Pankow in shambles. Now he's back, begging Musso for a job. Parker knows better than to trust him and is out to get to the bottom of his plan. In a game of cat-and-mouse, Pankow, Musso, and Parker are out to win.

The announcement of Junior Prom royalty is surprising and scandalous at the same time. On his own, Jerry is responsible for the outcome of Kubiac winning. Now that it's all gone to Kubiac's head, coming out with the truth proves to be hard and potentially very painful for Jerry.

Parker has many good days, some mediocre days, but only one worst day. Everything imaginable that can go wrong does. Even Shelly one-ups Parker when she plays an embarrassing video of Musso to the entire school instead of the video Parker really made for Musso, portraying her in a good light. In the end, Parker has had enough and ditches the rest of his day. Could this be the end?

Shelly joins the Dark Siders, whose initiation calls for her to be suspended from school.

Musso forces Parker to make a decision about his future. Kubiac runs from his booster shot. Shelly takes revenge on the cheerleaders.

Mikey lets his school work slide when he gets a chance to impress a record executive.

Musso mellows as she approaches her 40th birthday, so Parker calls in Dr. Pankow to get the old Musso back.

Parker's diary falls into the wrong hands and he is afraid of the possible consequences if it gets out.

Kubiac's girlfriend preaches pacifism, leaving the school defenseless.

Parker's dad protests the banning of a rock album by Dr. Pankow.

When his wife takes a philosophy class, Parker's father questions the universal truth of their marriage.

Santo Domingo's favorite alumnus returns to accept an award.

Parker and Annie open their souls to the audience to try to save their relationship.

Mikey needs extra cash so he gets a job at the diner.

Kohler is interested in the mother of the boy that Kubiak is babysitting. Annie tries to fix them up.