Hemliga byrån was a Swedish synthpop group with Swedish writers Anders Jacobsson and Sören Olsson.
One of their most famous songs, Hej, hej, hemskt mycket hej, became a 1987 Svensktoppen hit.
[1] Another famous song was Hjärtattack.
They also acted as house band for the TV series Trollkontroll in 1990, featuring a music video in each episode.