This is a list of episodes of the children's television series The Magic School Bus, which is based on the series of books of the same name written by Joanna Cole.
The show's continuity is not necessarily dependent on the order in which the episodes aired. In the first episode aired ("Gets Lost In Space"), Arnold mentions that the class has already been inside a rotten log ("Meets the Rot Squad") and to the bottom of the ocean (various episodes, including "Gets Eaten," "Blows Its Top," and "Ups and Downs").
The class is excited about going to Waterland. Wanda and Arnold are working on a project together and somehow Wanda convinces him to go to the girls' bathroom with her to get water. He accidentally leaves Ms. Frizzle's keys and Liz in the bathroom, and forgets to turn the water off. When they leave to go to Waterland, Ms. Frizzle instead uses a spare key which turns her, the class and the bus into water.
It is the day before the winter holidays, and the class is taking stuff to the recycling center, which is run by Murph (voiced by Dolly Parton), Ms. Frizzle's cousin. Wanda is going to see The Nutcracker and is bringing a toy soldier instead of taking money, as they are taking toys to give to homeless children. As usual, something goes wrong. Arnold mistakes the soldier for something being taken to the recycling plant and Wanda's soldier is turned into plastic pellets. Wanda angrily declares she wishes recycling had never been invented. Naturally, this gives the Friz an idea. She turn the bus into an anti-recycling machine, which changes the city to the way it would be without recycling. It cuts down the forest, and turns recycling trucks into garbage trucks. The kids are confused when it turns the swing set in the park into aluminum cans and such. Wanda is still pleased, since if recycling had never been invented, then her soldier would be still waiting for them in school. However the bus turns the school into a garbage dump when they get there. Finally, the bus "un-recycles" itself. Wanda then apologizes for having ever wanted to get rid of recycling, and wants it back. The Friz changes the bus so it changes everything back. Wanda makes new toy soldiers from the melted plastic pellets. Arnold has to leave for his sick grandma for Hanukkah. Soon, Arnold's classmates, Ms. Frizzle and Murph appear.
On Dorothy Ann's birthday, she has, unfortunately, been taken sick and has to stay home. The class does not know what to get D.A. as a present until they see Horace Scope (Dabney Coleman) on S.S.N., the "Star Shopping Network," who is selling the stars for seven dollars each. Tim reasons that if every student puts in a dollar, they will be able to buy Dorothy Ann a star and name it after her. However, Keesha refuses to put in her dollar, as her grandmother was once duped by a similar organization, the Home Mopping Network. Therefore Ms. Frizzle takes the class on field trip to see the three stars being sold by Horace Scope for themselves.