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Arnold's know-it-all cousin Janet drives the kids crazy when she joins Ms. Frizzle's class on a field trip and gets them lost in outer space!
Lily Tomlin
Ms. Frizzle (voice)
Daniel DeSanto
Carlos (voice)
Stuart Stone
Ralphie (voice)
Erica Luttrell
Keesha (voice)
Danny Tamberelli
Arnold (voice)
Malcolm-Jamal Warner
The Producer
