Special Guest Stars Lily Tomlin voices Professor Fizzle Sandra Oh voices Dr. Sarah Bellum Will Arnett voices Galapagos Gil Mae Jemison voices Kathy K. Kuiper Guest Stars Mikaela Blake voices Keesha Birva Pandya voices Jyoti Leke Maceda-Rustecki voices Carlos Gabby Clarke voices Dorothy Ann Miles Koseleci-Vieira voices Arnold Matthew Mintz voices Ralphie Kaden Stephen voices Tim Co Starring Ana Sani voices Additional Voices Annelise Forbes voices Additional Voices Lilly Bartlam voices Additional Voices Stuart Stone voices Additional Voices Amos Crawley voices Additional Voices Lisa Jai voices Additional Voices Jamie Watson voices Additional Voices Julie Lemieux voices Additional Voices