Sam and Brooke deliver their baby sister. Ms. Glass rents her basement to Josh and Lily, who try to face life's hardships together. Nicole tries to seduce George. Sam and Brooke make Harrison choose. The show ends on a huge cliffhanger.

Josh must choose between his parents' wishes and Lily. She proposes marriage. Sam and Brooke agree to make Harrison pay for the way he treated them. It backfires. The biggest girl in school challenges terrified Mary Cherry to a fight.

A killer stalks the students of Kennedy High, persecuting them because of something that happened over spring break.

Josh is anxious to prove himself on an academic game show hosted by Ed McMahon; Carmen swings with her sexy dance teacher instead of studying for the SATs.

Nicole stages a coup to overthrow the Glamazons and seize power; Brooke and Sam chafe under a dictatorship at home after one of them stays out all night.

Lily starts a gay and lesbian club to stamp out homophobia at Kennedy High, but her brave efforts are rewarded with a trip to the hospital.

Brooke and Carmen are invited under false pretenses to a predatory college party. Josh, George and Harrison try to get in uninvited. Nicole's biological mom isn't what she seems. Sam and Lily have a fun family evening with Jane and Mike.

News of April Tuna's sudden death make everyone face their prejudices about her and finally appreciate her. Josh is inducted into the secret Mullet Society. Sam learns that Harrison loves her. The new lunch lady may be Nicole's birth mom.

Mary Cherry is forced to wear "hobo sheik" clothing and hunt for food in a dumpster after her mother has financial troubles having her wardrobe seized. While Sam and Carmen have the challenge of saving their yearbook.

Nicole learns she's adopted and tries to track down her real mother. Sugar's hurt because Josh mostly hangs out with Lily now, so George befriends him. Harrison turns into a bad boy. The girls fear he's possessed and organize an exorcism.

Ms. Glass gives a lecture on STDs and prepares a Cabaret-type musical on the subject. The students are to play the STDs. Sam wants to lose her virginity with George but he's not ready. Sugar and Josh hire a cool prostitute for Harrison.

Harrison's roommate Clarence passes away sending Harrison into a depression that leads to a suicide attempt and a glimpse of what life would have been like if he had never been born.

Josh and Lily get cast for a play at the school where they have to appear nude in front of each other and everyone, which makes them uncomfortable. Brooke is at hospital again for treatment for her anorexia. Harrison is frightened when he walks into a room in the hospital and finds a ghost who seems to know a lot about him. Meanwhile, Carmen runs into Nicole in a meeting for teenagers with alcoholic parents, but Nicole totally ignores her.

Harrison goes to a clinic for cancer treatment and gets an annoying roommate. Brooke and Sugar go to the same clinic for their eating disorders. Mary Cherry locks Sam in the Novak and forces her to write her memoirs. Carmen tries to help.

Josh must attend the autopsy of a drunk driver. Sam confronts Harrison over his prescription drug abuse only to learn that he might be dying. Ms. Glass takes on Nicole's team in the homecoming race. Carmen reconnects with her mom.

Brooke withdraws from the homecoming queen race, whose nominees include a shocked Sam, Carmen, Mary and Nicole. Brooke instead joins the race for student council president. The death of a student leads to mandatory drug testing.

Nicole decides to get some revenge on Mary Cherry, using Harrison to do it. While she and Mary Cherry try to persuade Brooke to dump Josh and start dating George, in hopes that the new coupling will save's Brooke's plummeting popularity, and thus save their own as well.

A new arrival threatens Josh's place on the football team; Sam interviews the top jock for an expose; Nicole tries to get back on the cheerleading team.

Carmen runs away from home and moves in with Sam. Jane finds out she's pregnant. Brooke bonds with her new teacher, but she gets her in trouble. Ms. Glass wants to deceive her rich Aussie uncle, so she hires Nicole to play her daughter.

Ms. Glass equip her students with electronic baby dolls that require maternal care in an attempt to teach them about "the burden of parenting." Meanwhile Sam tries to convince Brooke not to leave, pulling out every trick at her disposal to do so. Emory's wicked twin sisters hold a party and try to outdo Nicole and Mary Cherry.

Brooke bonds with her long lost mother, much to her dad's objection as it causes tension between him and Jane. Meanwhile, Lily and Sugar try to save the forever tree from being cut down. While Sam tries to fix the mess she caused that results in a startling revelation.