The Big Bang Theory

The Earworm Reverberation

Aired Dec 10, 2015 · 8:00 PM ET · 25 min

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."