Buried Treasure

Summary
An urban explorer named Scraps gets trapped in an underground trash mine. Thomas, Percy, Nia, Scott, Virgil, and Gordon,[with special guests the Rubbadubbers] must pull off a rescue without becoming buried treasure themselves. Meanwhile, back on Tracy Island, Brains attempts a risky mission.

Trivia

 * This episode is dedicated to Sean Hughes, the voice of Finbar.