When the class gets an invite to compete on Tim's favorite TV game show, the bus takes them all back in time to bone up on how fossils are formed.
Guest Cast
Lily Tomlin
voices Professor Fizzle
Nathan Fillion
voices Axle ValveStuck
Martin Short
voices Tony Tennelli
Catherine O'Hara
voices Aunt Tennelli
Jay Baruchel
voices Dr. Tillage
Birva Pandya
voices Jyoti
Matthew Mintz
voices Ralphie
Lynsey Pham
voices WandaCast Appearances
Kate McKinnon
voices Ms. Fiona Frizzle
Kaden Stephen
voices TimEpisode Discussion
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