The ninth season of Big Brother Germany began on 8 December 2008 and ended on 6 July 2009 for a total of 211 days.
The 9th This season was hosted by Miriam Pielhau and Alida-Nadine Lauenstein.
From Day 36 (12 January 2009) onwards, the concept of this season was changed due to bad ratings.
"Hell" was only used as living area for punished or nominated housemates.
Because of the structural changes of the interior, alteration that were done on Day 34 and 35 forced the housemates to live in the 2 rooms used for matches.