The Magic School Bus fails to pass inspection by Mr. Junkett, the vehicle maintenance inspector, and the kids are determined to get it running before the tow truck arrives to take it to the junk yard. With Ms. Frizzle's help, the class ends up inside bus's engine for an explosive adventure where they learn how gas plus air plus a spark make the engine run.
Elenco: Daniel DeSanto , Stuart Stone , Erica Luttrell , Malcolm-Jamal Warner , Dan Tamberelli , Lily Tomlin , Frank Welker , Whoopi Goldberg , Susan Blu , Edward James Olmos , Andre Ottley-Lorant .