Sture Ragnar Bergwall, also known as Thomas Quick from 1993–2002, is a Swedish man previously believed to have been a serial killer, having confessed to more than 30 murders while detained in a mental institution for personality disorders. Between 1994 and 2001, Quick was convicted of eight of these murders. However, he withdrew all of his confessions in 2008. As a result, his murder convictions were quashed, the final one in July 2013, and he was released from hospital. The episode raised issues about how murder convictions could have been obtained on such weak evidence, and has been called the largest miscarriage of justice in Swedish history. Journalists Hannes Råstam and Jenny Küttim and Dan Josefsson published TV documentaries and books about the murder cases; they claimed that bad therapy led to false confessions. Dan Josefsson claims that a "cult"-like group led by psychologist Margit Norell manipulated the police and talked Sture Bergwall into false confessions.

Karl David Sebastian Dencik is a Swedish-Danish actor. He has acted in both Swedish and Danish films, and has also had major roles in English-language films and series including Tinker Tailor Soldier Spy (2011), The Girl with the Dragon Tattoo (2011), Top of the Lake (2017), McMafia (2018), Chernobyl (2019), and the James Bond film No Time to Die (2021).