The kids learn to see the world through the eyes of different animals when a careless Arnold loses Carlos's pet rat -- then turns her invisible!
Guest Cast
Lily Tomlin
voices Professor Fizzle
Nathan Fillion
voices Axle ValveStuck
Jay Baruchel
voices Dr. Tillage
Martin Short
voices Tony Tennelli
Catherine O'Hara
voices Aunt Tennelli
Leke Maceda-Rustecki
voices Carlos
Matthew Mintz
voices Ralphie
Birva Pandya
voices JyotiCast Appearances
Kate McKinnon
voices Ms. Fiona Frizzle
Miles Koseleci-Vieira
voices ArnoldEpisode Discussion
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