SOKO Donau is an Austrian crime drama television series produced by ORF in collaboration with the German network ZDF. It is the sixth spin-off of the German crime series SOKO 5113, launched in 1978. The show, which debuted on 20 September 2005 in Austria and 18 October 2005 in Germany, focuses on a Viennese police team responsible for investigating crimes committed on the Danube river and its tributaries.