Grug accidentally reveals a subterranean cave beneath the treehouse. When Phil can't convince Hope, Grug, and Ugga that the treehouse is more impressive than the new cave, he sets out to destroy the cave.
Guest Cast
Hannah Parrott
voices VocalistCast Appearances
Kiff VandenHeuvel
voices Grug
Amy Landecker
voices Ugga
Ally Dixon
voices Eep
A.J. LoCascio
voices Thunk
Artemis Pebdani
voices Gran
Darin Brooks
voices Guy
Matthew Waterson
voices Phil
Amy Rosoff
voices Hope
Abby Trott
voices DawnEpisode Discussion
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