It's Parent's Night at Eastland and Blair's sophisticated mother arrives bringing with her, her flirtatious tendancies which prompt rumors when she becomes ""friendly"" with a married man.

Tootie's father comes for a visit and doesn't like the activities that Tootie is being exposed to. Believing that Mrs. Garrett is a bad influence, Mr. Ramsey decides to have Tootie transfer out of Eastland.

Mrs. Garrett begins teaching a sex-education class at Eastland and her tactics are against the more prudish suggestions of Mr. Bradley. Meanwhile, Blair takes the ideas from class and expirements with her latest boyfriend, Steve.

A flood hits Peekskill which prompts Blair and Tootie to race out to the stables to save some animals from being washed away. However the damn breaks and Blair and Tootie become in danger of being washed away.

Blair and Sue Ann befriend two new girls. All seems to go okay with them until they learn that their friends use drugs.

Streetsmart Bronx native, Jo Polniaczeck arrives at Eastland.

Jo's boyfriend, Eddie, surprises her by making a sudden visit to Peekskill, but she gets even more of a surprise when he proposes marriage.

Jo is unsure of whether or not to accept Eddie's proposal but finally decides to go ahead with the wedding, despite the feelings of Mrs. Garrett, Blair, Natalie and Tootie.

Shortly after winning an award, Jo learns that her jailbird father, is getting paroled and that he would like to attend the awards ceremony. However, an ashamed Jo, tries to keep her father from attending as well as tries to keep secret the fact that her dad is in prison.

Natalie's planning a weekend of romance with her boyfriend, but when her Grandma Mona drops in unexpectedly, her romantic intentions are postponed.

Natalie has a big crush on Tim and has filled Blair's slambook with words of praise. However, in Blair's slambook instead of signing your name you sign a number, Natalie's number is 10. When Blair tells Tim who number 10 belongs to, Natalie is furious and wants revenge no matter who she hurts in the process.

A friend of Jo's, Buzz, who attends a military academy, needs her to fix him up with a wealthy socialite, since he made a bet with some of his buddies. So Jo fixes him up with Blair who thinks he dates wealthy women including Gloria Vanderbilt's daughter.

Yet another episode that revolves around the boys at a military academy. One of the young cadets, Alfred, invites Natalie to see him box in a tournament. However the only reason he gets into this situation is do the fact that his father suggested it. Later, Alfred learns that his father isn't even going to attend and is now faced with the possiblity of backing out on a fight against an opponent who intimidates him.

A new student arrives at Eastland claiming to be a royal princess. All seems to go okay, but then Tootie catches her with a boy. Since it is against the rules to have an uninvited guest, Tootie starts to become suspicious.

Tootie is excited about the impending visit of her brother Marshall, however is stay becomes one of fear when he invites the girls to a college party where beer is being served. After the party, a drunk Marshall, insisting that he isn't drunk, offers to drive Blair, Natalie and Tootie home. However, their trip home is interrupted by an accident.

Jo has been accepted at Langley College along with Blair but doesn't tell anyone that she has since she doesn't plan on going due to her and her parents financial situation. However, when she takes a trip home for the weekend, she learns that her entire family found out the truth and are now counting on her to do well.

A strange man tells the girls that years ago a murder occurred in the shop. Later, when the girls see Mrs. Garret with a knife they assume that she's possessed by the murderer's spirit and is out to get them.

The holidays bring joy to the girls when they all plan on going home for Christmas but when Jo's mother temporarily moves to Miami, Jo is stuck in Peekskill.

A marriage proposal from Blair's boyfriend prompts her to begin dreaming about the future for herself and her friends.

Tootie's mother comes to Eastland for a visit, and the fact that Tootie doesn't communicate with her mother becomes apparent. Her mother quickly realizes there are many things she doesn't know about her daughter and wants to have an open relationship with Tootie but will Tootie allow that?

Another school year has come to an end and all the girls are preparing or their summer vacation. They each reminisce about the last six years they have spent together (via flashbacks). However, leaving one another on good terms is something that may not happen when an accident causes yet another rift between Jo and Blair.

Flashbacks and memories of the past continue as the girls finish getting ready for their summer vacations. However, saying goodbye to one another appears to be easy for all them especially since fights are brewing between Blair and Jo and Natalie and Tootie.

Jo begins a pizza business with her mom's secret pizza recipe that has everyone's mouths watering, including a fraternity house that buys pizzas in bulk. However, the business begins running Jo and her workers, Natalie and Tootie ragged which leads Jo to make a business decision on how to make pizzas faster and cheaper.

For the Christmas season, Blair and some of her snobby friends plan on putting on a Christmas show at a home for boys. Her Christmas spirit quickly changes when she discovers that the home for boys is really a home for convicts.

With Mrs. Garrett out of town, Blair wants to be in charge of the shop so a reluctant Jo, Natalie and Tootie step aside and let her. Quickly Blair's handling of a competitor food shop goes awry.