PD had decided a serial bomber had died or moved on when 5 years passed with no bomb fatalities in Philadelphia, but a pilot was seriously injured in a sports club by a bomb with identical characteristics. He tells Lilly he had heard music just before the bomb went off; a janitor reveals he had seen a music box in the locker which exploded. The Cold Case team realizes they need to find a link among the seemingly unconnected victims.

Resumen IMDb.com