Usually outgoing, way cool Marsha is way down in the dumps. It's time to go back to school, and she's now a freshman at high school with many new classmates. She doesn't think she'll fit in. OMG.
In the first place, y'all can't blame her after being in Hawaii! The family doc is called in --and comes a suggestion. Why not get into some school activities? So in typical Brady Bunch fashion she signs up for EVERYTHING.
You can't miss Marsha struttin' around the house in a scuba suit! That is the absolute first. She also applies to an exclusive club called the Boosters, which is sort of a snooty group --and is that really her? Noooo way.
Best of the best is industrious Peter ( in a world of his own), who all us teens could relate to back in the day. His school project is to build a mini volcano --and lava will ooooooze out all ova' the place!!! This is actually a tried and true project that lots of kids did (still do), and Pete is having a blast. He comes off as the wacky teen mad scientist.
Even to see a picture of a volcano, to this day, I always think of this goofy episode.
The stuffy Boosters, of course, pay a visit just as Peter ignites the killer volcano and everybody gets SPLATTERED. The Big Explosion also gets Marsha out of her deep funk.
Two important footnotes. This way fun episode was written by William Raynor, one of the best sitcom writers, behind such shows as MCHALE'S NAVY, DORIS DAY SHOW and later, DUKES OF HAZZARD. John Howard returns as the family doctor, who worked at Paramount 40 years earlier. Howard was a movie star way back when, his breakthrough role in the original LOST HORIZON (1937).
Don't miss Alice getting dumped on by the volcano. Classic Brady Bunch.
SEASON 4 EPISODE 4 remastered Paramount/ABC dvd box set.