Trollhunters: Tales of Arcadia
It's one of those "magical creatures actually exist in the modern world and the kids need to keep it a secret from everybody else" type shows. While it is ostensibly geared towards children, it's actually really clever with a decent plot and plenty of humor that should keep even the adults entertained.
It features the voice talent of the late Anton Yelchin
as the main character. Anton's untimely death happened after just a few episodes into the final season had been recorded, but Emile Hirsch
did a good job as a replacement; I didn't notice the difference. (My wife did, but didn't point it out to me until we had finished the series.)
It's good, clean fun for the whole family.