In a 2006 interview with Pitchfork Media, the Knife cited David Lynch, Aki Kaurismäki, Korean cinema, "Trailer Park Boys", "Donnie Darko" and "Doom" as inspirations for their work. In addition, Karin named Sonic Youth, Kate Bush, Le Tigre and Siouxsie and the Banshees, while Olof cited techno, grime and Southern hip hop. In 2008, Karin announced the release of a solo album under the name Fever Ray in March 2009. The eponymous album was digitally released in advance of this date. The single "If I Had a Heart" was featured in a 2011 episode of "Breaking Bad" and in the 2013 film "Horns", is the opening theme of the Canadian-Irish historical drama television series "Vikings", and is the opening of the movie "Laurence Anyways" by Quebec director Xavier Dolan, who also used Karin's song "Keep the Streets Empty For Me" in his movie "Les Amours Imaginaires". In a 2016 interview with The Fader, Karin related that they are currently working on more solo music, though they are "unsure" if it will be under the "Fever Ray" moniker or not. Olof performs as both DJ Coolof and Oni Ayhun. The Knife initially did not play live shows, until 8 February 2005 when they played a show at the Institute of Contemporary Arts in London consisting of a screening of "When I Found the Knife" by Andreas Nilsson and performances of "Heartbeats", "You Take My Breath Away" and "You Make Me Like Charity". The song "We Share Our Mothers' Health" featured in the ABC series "Ugly Betty", as well as an episode of "". In August 2007, "Heartbeats" was featured in an episode of the HBO series "Entourage". The song was later used in an episode of the HBO series Girls. The song "Wrap Your Arms Around Me" from their 2013 album was used in the closing scene and credits of episode 9 of the 2017 season of the Hulu series "Handmaid's Tale". Their song "Pass This On" was used in the 2010 drama film "Les amours imaginaires" by Quebec director Xavier Dolan. The film premiered in the Un Certain Regard section of the 2010 Cannes Film Festival. "Pass This On" was also used in the 2011 drama Elles by Polish director Małgorzata Szumowska and in the 2013 thriller "Magic Magic" by Chilean director Sebastián Silva, which premiered at the 2013 Sundance Film Festival and opens with Canadian actor Michael Cera singing along to the song.