 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 shown.