Linha Direta is a Brazilian investigative television programme broadcast by Rede Globo, built around unsolved crimes, dramatic reconstructions and appeals for information from viewers. Its opening music became closely linked with that serious, investigative tone, and Brazilian creators later lifted the short theme for online videos, parodies and reaction edits. It remains popular because the sound alone sets up an investigation, even when the subject is deliberately ordinary or comic, turning a small mystery into something that feels like a television case.