Finn and Fern's carefree visit to some old ruins turns disastrous.
Guest Cast
Andy Milonakis
voices N.E.P.T.R.
Fred Melamed
voices GumbaldCast Appearances
Jeremy Shada
voices Finn
John DiMaggio
voices Jake
Hynden Walch
voices Princess Bubblegum
Niki Hyun Yang
voices BMOEpisode Discussion
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