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". It became a 1987 Svensktoppen hit. Another famous song was "Hjärtattack". They also acted as house band for the TV series "Trollkontroll" in 1990. The series features a music video in each episode.