To help them understand how the Earth makes islands, Ms. Frizzle presents the kids with an island that hasn’t been discovered yet!

Ms. Frizzle takes the class on a dinosaur dig, courtesy of her old school chum, paleontologist Dr. Carmina Skeledon, and travels 67 million years back in time!

When Ms. Frizzle invites the class’ parents in to see that their kids are learning about bats, Ralphie and the gang are convinced The Friz is a vampire! With Tyne Daly as Ralphie’s mom; Eartha Kitt as Keesha’s grandmother; Elliot Gould as Arnold’s dad; Dana Elcar as Phoebe’s dad; and Edward James Olmos as Carlos’s dad.

The class needs a new mascot for its soccer team. Phoebe suggests butterflies, but everyone thinks they’re wimpy—until The Friz flutters in!

Arnold and Wanda are due to give a report on the town waterworks. But Ms. Frizzle thinks it's field DRIP time! She turns the bus and class into water drops and the kids evaporate, condense, become rain and rush by river into the ocean. After several trips through the water cycle, they're ready to turn back into regular kids. But the magic key that will get them out of the cycle is locked in the school bathroom! Trying to work their watery way into the bathroom, the kids go through the town waterworks and see how water is purified. Can they get to school through bathroom pipes? Or are they stuck in the water cycle forever?

Keesha and the class return from vacation to find her prize cucumber has turned into a pickle! Could the Mike Robe gang be to blame?

The school district’s Vehicle Maintenance Inspector, Junkett is about to condemn the Magic School Bus!

Shrunk inside Tim’s model airplane, the class goes on a high-flying field trip to find out how things fly.

The class is ready to plug in their “Double-Trouble Wheel of Wonder” at the town carnival, when they discover all the electrical outlets are taken.

When Dorothy Ann warns the kids there’s an asteroid headed straight for their school, Ms. Frizzle arranges a field trip into space.

Liz has gone off to a mysterious place called “Herp Haven.” Thinking she’s in trouble, the class rushes to Herp Haven, where they turn into reptiles. With Michael York as Herpst.

There’s a monster in Walkerville Lake! Wanda competes with Gerri Poveri, a TV reporter whose ratings are sinking, to be the first one underwater.