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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.

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

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

The staff, including Charlie, go on strike

The girls don't like their gym teacher, but she likes Charlie

The spirit of "Hair" leads the cast to go on with the show in defiance of Mrs. Hartman, who explains her objection to Charlie.

Eric and Simone go on their first date.

The IHP class behaves obnoxiously when their bus breaks down at a rural truck stop.

With a wrecking ball ready to demolish the school, the IHP class waits to fund out who's to be valedictorian. (Part 1 of 2)

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An accomplished journalist alumnus visits.

Charlie's efforts to broaden the audience and membership of the school's radio club tune out the original fans - and its only member.

T.J.'s first assignment as the newest member of IHP is ridiculed by Dennis.

Alan and Sarah both want to be class president

Charlie teaches the class about grief.

The IHP students help the school's star athlete prepare for his college entrance exams.