A popular teacher has Alzheimer's

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The class makes a music video for a time capsule

Arvid goes out with an easy girl

Fed up with Dennis' constant gags, Charlie shows him the door - to a remedial-history class, where Denn becomes the inspirational leader for an acade meet the IHP kids.

The IHP class graduates, with T.J. as valedictorian. (Part 2 of 2, and series finale)

In Moscow, Dr. Samuels insists on study for an academic meet, while Charlie lobbies for more personal cultural experiences. (Part 1 of 2)

The team begins the competition without Eric, Arvid or Dennis.

Dennis gets a job as a waiter to help pay off debts.

The final days before opening night are fraught with chaos: no Ronette, Mr. Mushnik MIA, one lead with laryngitis and another ready to walk just before curtain time.

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Charlie moonlights as a character in late night commercials for an appliance store.

Janice says there is a poltergeist following her and soon the class begins to believe her.

The IHP's parent's come to see how the class is taught

Dennis becomes smitten with a quick-witted student who reprimands him for not cleaning his science-lab work area.

A high school substitute teacher takes over a class of geniuses.

Charlie is upset when the IHP's regular teacher announces his return from sick leave.

Charlie's ex-flame evaluates the class

Simone receives a discouraging letter from her favorite poet....after his death. Dennis tries to give up sarcasm and pranks.

The class puts on Grease

Arvid's Dad teaches the honor's math class.

The staff, including Charlie, go on strike

The class imagines life 20 years in the future

Mr. Moore spends Thanksgiving with Dr. Samuels

The IHP are concerned when they learn a transfer student might join their class, making it necessary for one of them to leave. They fight over who it should be.