Underjordens hemlighet
- Sal: 1991
- Welat: Sweden
- Genre: Family, Comedy, Drama
- Studio: Sandrews, FilmTeknik, Cinetofon, Svenska Filminstitutet, SVT
- Keyword: hospital setting
- Serek: Clas Lindberg
- Avdan: Max Vitali, Oliver Loftéen, Gösta Ekman, Kristina Törnqvist, Gunnel Fred, Hans Wigren
