After the illuminating light show at Walkerville's old theatre, Arnold's bossy cousin Janet claims she could put on a much better show. Nobody believes her until Janet and Arnold mysteriously disappear. Ms. Frizzle leads her class into the darkened theatre to look for them. To shed some light on the problem, the kids become beams of light. Then, to their great shock, they see Arnold's ghostly image floating high above the empty stage! Is the theatre haunted? Is this just one of Janet's tricks? Or have they all been "Frizzled"?

The Magic School Bus goes into show business when Keesha directs a movie about social animals for the school science fair. The class visits the inside of an anthill to observe their "characters" at close range and discovers that each ant performs a vital job for the survival of the colony.

It's Valentine's Day and the class is selling light bulbs. When they stop at Ms. Frizzle's house to sell her one, they find that her battery-operated doorbell doesn't work. While looking for Ms. Frizzle to tell her the doorbell's broken, Wanda overhears her teacher talking on the telephone. "Ms. Frizzle has a boyfriend," says Wanda, "and he's on his way over to see her! We've got to fix the doorbell or she'll never know he's here!" But first they have to figure out how the doorbell works...

Arnold and Keesha are in trouble when they forget an assignment to bring in "two things that go together." A soggy shoe and a tunafish sandwich, all they've got, lead to an ocean field trip in search of the connection between these two unlikely objects.

When Phoebe tries to grow a big vine for her school's production of Jack and the Beanstalk, all she ends up with is a stunted little sprout. To help out, Ms. Frizzle turns her into a real vine. But to grow tall, Phoebe needs to figure out how plants eat - fast! To unearth the amazing ways plants make their own food, the Friz and the kids shrink down and dig deep in a quest to root out the facts!

Ms. Frizzle's class arrives early to open the school for Mr. Ruhle (Paul Winfield). But there's so much to do! "There must be a way to do all of these chores without actually doing them," says Carlos. The school handyman, Mr. McClean (Malcolm McDowell) is in total agreement. Enter Mr. Ruhle's new computer and Mikey, Carlos' whiz kid brother, who programs it to do all the chores! But when Ms. Frizzle shrinks Mikey and the class and sends them inside the computer for a guided tour, everything goes haywire. The only person who can fix the problem is Mikey - and he's just landed somewhere between the CPU and the hard drive!

It's Ms. Frizzle's birthday, and a field trip to the bakery seems perfect... until the bus' shrinker-scope goes on the fritz, and the class experiences chemistry first hand as they get baked in a cake!

The debate is intense: Should Walkerville get rid of the swamp by the river and replace it with a fantastic new shopping mall or build the mall somewhere else? Carlos, representing his class, is given the thankless task of persuading the town council to keep the smelly old swamp. If he loses the debate, he'll lose to Arnold's pesky cousin Janet! The kids learn that the swamp is an important habitat and natural water filter, but the council's not convinced until... FLOOD!!

In the TV show "GETTING ENERGIZED," the class plugs their Double-Trouble Wheel of Wonder, the hottest ride at the school carnival, when their electricity fails. No electricity, no ride! Carlos' younger brother Mikey helps them discover that there are other sources of energy besides electricity. Using wind, water, the heat of the sun, falling rocks, and their own muscle power, the class gets the Ferris wheel running.

It's the night of the rock lovers' annual Granite Awards, and Arnold is about to become the first kid ever to win the coveted Rocky Award. He's so excited, all he's been able to eat for weeks are "Seaweedies" - and lots of them! When he arrives for the big event, he's totally nervous and totally...orange! Once the class determines that the orange isn't on Arnold's skin, they shrink down to explore what's underneath. They discover that his whole body is made of living cells - and they're all orange! But where is the orange coming from... and how can they make it go away?

"We got assigned air, and it's not fair!" The only contribution the kids in Ms. Frizzle's class have made to the Walkerville Space Capsule is an empty jar. "It's not empty," argues Keesha. "It's filled with air!" "But air doesn't do anything!" wails Ralphie. They discover that's not so when the bus shrinks and gets stuck inside the jar - and the class finds that their only hope for escape is... air!

The class' garden is going to be featured on the cover of PLANT IT! magazine. But Phoebe's garden plot is glaringly empty. Always eager to help, Ms. Frizzle shrinks the bus to the size of a ladybug, and the class is off and flying to Phoebe's old school to find a plant.

Ralphie wants to catch salmon to serve at the annual school picnic, but he can't find any at his favorite fishing spot. Where could all the salmon have gone? The kids are soon "Frizzled" inside a salmon bus that has an uncontrollable urge to head upriver. "Wait!" Ralphie cries. "We'll be late for the picnic!" But the salmon bus won't stop. Using its sense of taste and smell, it swims the long journey to a shallow freshwater stream miles away. Why has the bus, which thinks it's a salmon,gone to all this trouble?

In the TV show "GOING BATTY," the class is studying nocturnal animals and Ms. Frizzle takes the parents on a nighttime field trip to learn more about bats. As the night progresses, Ralphie becomes convinced that The Friz is a vampire! The class follows Ms. Frizzle and their parents to a scary old castle where, by becoming bats themselves, the kids find out the wonderful truth about these creatures of the night, and Ms. Frizzle!

It's the last day of school before the winter holidays and Wanda plans to see the Nutcracker ballet. But during a trip to a recycling plant that belongs to Murph (Dolly Parton), the toy soldier she needs to get into the theater accidentally gets recycled! Devastated, Wanda wishes for a world without recycling. Ms. Frizzle activates the bus's un-recycler, taking the class and Murph on a song-filled field trip. The importance of recycling hits home when the bus's magic unrecycles everything in Walkerville - including the bus itself, as it too was made from recycled objects! Will the kids find a way to reconstruct the bus in time for Wanda to get back to see the Nutcracker?

When Wanda's pet frog, Bella, jumps out of an open window, Ms. Frizzle shrinks the bus into a mechanical frog and takes her now tiny class on a hop-along adventure in search of Bella and her true home.

When Tim delivers the last of the season's honey to his grandfather's customers, the jars get broken. Tim's solution is simple: get more honey from some bees. But Ms. Frizzle sweetens the idea by turning her class into bees and showing them a beehive up close and personal. When a bear steals the bees' hard-earned supply of honey, the bee-kids discover one last field of nectar-filled flowers. How will the bee-kids communicate this information to the bees in time for them to harvest enough honey before the flowers are killed by the impending frost?

In the TV show "IN A PICKLE," Keesha returns from vacation to find that her prize cucumber has been stolen and was replaced with a smelly old pickle. When the evidence seems to point to Ms. Frizzle as the culprit, the class puts her on trial, with Keesha as prosecutor and Arnold as defense attorney. The Friz says a tiny group of troublemakers called the Mike Robe (microbe) Gang is responsible and takes the class for a visit into the teeny tiny world of microbes. There, they discover that even tiny living things can have a big effect.

"Where did the hot go?" wonders Arnold when he finds that his hot cocoa has cooled. In response, Ms. Frizzle whisks the class to the Arctic! What's the freezing Arctic got to do with heat? While the kids try to find out, the bus's engine freezes and the bus floats away on an ice floe with Ralphie and Phoebe inside! As the bus moves away, so does the heat from everyone's body. How can Ms. Frizzle's kids insulate their body to keep the heat in? Can they rescue Ralphie and Phoebe before they all become the Ice Cube Kids?

Ms. Frizzle's class is visiting the zoo, which is, according to Tim, the only place in the city where wild animals can survive. To test this idea - ZAP! - Ms. Frizzle turns the class into possums, foxes, and falcons! The Bus, with Liz inside, becomes a bear and wanders off, looking for food. Will the kid-animals be able to find the Bus-bear before the zookeeper finds it? And is Tim right? Can animals (like themselves) survive in the city?