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The Big Bang Theory
Season 9 · Episode 10
The Earworm Reverberation
7.921mDecember 10, 2015
Sheldon has a revelation when he realizes why a song was stuck in his head. Also, Amy invites Dave over for dinner despite their previously awkward date, and Wolowitz and Koothrappali become obsessed with a fan of their band, "Footprints on the Moon".