At the end of season three, Nick's Grimm powers are removed by Adalind as a result of sleeping with her when she disguised herself as Juliette, but he regains his powers in "Highway Of Tears".
Nick's Grimm powers are removed by Adalind as a result of sleeping with her when she disguised herself as Juliette. This was at the end of season three. He regains his powers in "Highway Of Tears".