Board Thread:Grimm News/@comment-50.137.18.47-20150110040902/@comment-3125844-20150216190922

The showrunners have confirmed she'll be back the last few episodes of the season, but which episode she returns in has not been set yet as they are still working on writing the last few episodes

http://www.zap2it.com/blogs/trubel_return_grimm_season_4-2015-02