Ms. Frizzle takes the class to a dinosaur dig, courtesy of her old school chum, paleontologist Dr. Carmina Skeledon. To complete the field trip, they travel back in time — 67 million years — to see what dinosaurs were really like! Arnold's fossilized egg, put in his care by Dr. Skeledon, is snatched by a dinosaur and he ends up squaring off with a T-Rex. To their relief, the class finds out that even the fiercest dino's prefer flight to fight.
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 .