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Amazing Cave Animals

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Host Jessi, a male co-host and Squeaks the robot rat get ready to visit their friend Sam the bat in his cave. Along the way they explain that a cave is a habitat, show real footage of an olm, a Mexican tetra and a cave spider, and point out that these animals have no eyes. They walk the viewer through why deep cave animals rely on smell and touch instead of sight, and invite the child to close their eyes and notice their own senses. The episode ends back in the studio as the hosts finish packing for the trip.

The Scientist Who Studied Bug Brains

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Two hosts and their robot rat Squeaks watch honey bees in a garden and then tell the true story of Dr. Charles Henry Turner, a scientist who proved that bugs can learn and remember. The episode explains his colored-box experiment, which showed bees can see color and return to where they found food, and notes that he was refused a university job because he was Black. It closes with the hosts wondering about their own bee questions and inviting children to experiment. Real bee footage and simple animations illustrate the science and Turner's life throughout.

Super Slugs

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Host Jessi and her robot rat Squeaks explore how a sea slug called the emerald Elysia can make its own food from sunlight. From a bright studio set, Jessi explains that plants and algae use chloroplasts to turn light into food, and that the slug keeps those tiny machines running after eating algae. Real footage of slugs, algae and ponds is mixed with simple animated diagrams. The episode closes with Jessi and Squeaks heading to the garden to pick tomatoes for a salad.

Animals That Eat Poop

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Host Jessi and her robot rat Squeaks explore why some animals, especially dung beetles, collect and eat poop. From a bright studio set, Jessi explains what beetles are, describes the dung beetle's horns, wings, and strong legs, and works through the mystery of the ball Squeaks saw one pushing. Using real footage and simple diagrams, she shows how nutrients pass from grass through cows into poop, which beetles then reuse for food and to feed their young. The episode ends with Squeaks eager to learn about more unusual animals.

All Dried Up

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Ms. Frizzle's class builds a desert diorama and Phoebe becomes convinced the desert animals need rescuing from heat, hunger and thirst. The magic school bus flies them into a real desert, where they watch a lizard, jackrabbit, tortoise and other animals cope with the harsh conditions on their own. A sudden rainstorm floods the land and, by morning, the desert blooms, showing how everything there is adapted to survive. The episode closes with a phone call in which a caller quizzes the bus about desert facts and asks after Phoebe.

Iceland: A Land of Ice and Fire

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Jessi, the host, welcomes back Squeaks, a robot rat, who shares photos from his trip to Vatnajokull National Park in Iceland. Together they figure out where he went and explore why this 'land of ice and fire' has both fiery volcanoes and freezing glaciers, using maps, diagrams and real photographs. They learn how volcanoes and glaciers form, how tectonic plates shape the land, and which plants and animals live there, such as moss and harbor seals. The episode ends with Jessi thanking Squeaks for sharing and inviting viewers to think about whether they would explore a volcano, a glacier, or both.

In the Haunted House

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Carlos has invented an instrument for a school concert, but it makes only a 'loopy' sound and he cannot fix it in time. When the magic school bus overheats, Ms. Frizzle's class ends up spending the night in what turns out to be the Sound Museum, a spooky old house where they chase mysterious noises and learn that sound is made by vibration. Guided by their questions and a living descendant of the museum's founder, Carlos works out that his instrument needs to vibrate freely, strips it down, and finally produces the sound he imagined. The episode closes with a phone call to the show's producer that reviews how sound and hearing work.

Worms Are Wonderful

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Jessi, a science host, and her robot friend Squeaks introduce earthworms and explain what makes them special. Standing in an illustrated set, she covers how worms differ from insects and snakes, how they move and breathe, why they live in burrows, what they eat, and how they enrich soil through tunnelling and composting. Real footage of worms, birds and soil is mixed with cartoon diagrams of worm anatomy. The episode closes with the message that healthy worms mean healthy soil and healthy people, and a thank-you to the viewer.

KABOOM! All About Volcanoes!

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Jessi welcomes viewers to the fort and, with the robot rat Squeaks and Sam the Bat, explores volcanoes. They explain how Hawaii's islands grew from a hot spot, why Mars holds the solar system's tallest volcano, Olympus Mons, and the different shapes and sizes volcanoes come in. Real footage of lava and maps back up the talk, along with how scientists predict eruptions and keep people safe. It ends on the idea that the Earth is always changing and an invitation to come back next time.

Close Encounters of the First Kind

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A small spaceship lands near a town and a green visitor steps out to explore. It copies a flower and a row of mailboxes, then takes on Cony's appearance and wanders into the café where Brown is working, which leaves Brown staring at two identical Conys. The visitor returns to its ship, replays its recordings of the flower, the mailboxes and Brown and Cony crossing the street, and flies away. Brown and Cony end the episode outside the café sharing a drink.