Season 1 of Denkzeit premiered on January 20, 2007.
Season 2 of Denkzeit premiered on March 13, 2010.
Season 3 of Denkzeit premiered on April 2, 2011.
Season 4 of Denkzeit premiered on January 21, 2012.
Season 5 of Denkzeit premiered on October 26, 2013.
Season 6 of Denkzeit premiered on January 11, 2014.
Season 7 of Denkzeit premiered on February 21, 2015.
Season 8 of Denkzeit premiered on January 2, 2016.
Season 9 of Denkzeit premiered on January 7, 2017.
Season 10 of Denkzeit premiered on January 13, 2018.
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