The historian Hans Villius began working with TV-producer Olle Häger at the Sveriges Television (SVT); their very productive collaboration spanned some two decades. During the 1980s and 1990s Häger and Villius produced several popular documentaries, among them Raoul Wallenberg - fånge i Sovjet (Raoul Wallenberg – Prisoner in the Soviet Union), which explores the Swedish diplomat's tragic fate after being abducted by the Soviets immediately following the siege of Budapest.