Grimm Season 2 (2012)

Facing their far and family feral past shakes up the Portland PD protagonists. Nick joins forces with his death-presumed mother Kelly Burkhardt, a huntress who followed Akira Kimura, to chase the excessively cruel 'mauvais dent' monster murderers, who are after six golden coins, part of the key to a terrible secret since the crusades. It's the obsession of rivaling feral royalty branches, including Renard's, putting him opposite his estranged European half-brother.