Season 6 - Grimm

The series finale features a "20 years later" epilogue showing Nick’s children, Kelly and Diana , continuing the Grimm legacy as a team.

A recurring mystery involves symbols appearing on cloth that are tied to mirrors acting as gateways to a dark, prehistoric-like world. Grimm Season 6

Lead actors David Giuntoli (Nick) and Bitsie Tulloch (Juliette/Eve) actually got married in real life in June 2017, just months after the series finale aired. Grimm Season 6 Episode 12 Review: Zerstörer Shrugged The series finale features a "20 years later"