Das Duo was a German crime series produced by TV60Filmproduktion (Sven Burgemeister) for ZDF. The show was set in the town of Lübeck. Swiss actress Charlotte Schwab played the main role as Commissioner for Criminal Investigation Marion Ahrens, who initially works alongside Lizzy Krüger (Ann-Kathrin Kramer), and later Clara Hertz (Lisa Martinek). From 2002 until 2012, a total of 24 episodes were broadcast at irregular intervals.

In August 2012, it was announced that in September 2012, the last episode of the series would be televised. The broadcaster justified this decision by stating that the separate parties wanted to go in different directions.

In 2016, a new series of crime films called Solo für Weiss, in which Anna Maria Mühe plays the role of LKA target investigator Nora Weiss, appeared on German television.