The BAFTA-winning drama returns for three feature-length episodes, following detective Kurt Wallander who is investigating a series of terrifying murders in Skane, southern Sweden.
Mark plays detective and family man Stefan Lindeman, who has transferred to Ystad Police after a long career in the CID in Gothenberg, believing it will mean a quieter life. Unlike Wallander, Lindeman lacks ambition - yet, he is loyal, intelligent, diligent and practical.
Harry Kershaw appears later in the series.
Wallander returns to BBC1 on Sunday 8 July at 9pm, lead written by Peter Harness and directed by Toby Haynes.