According to http://www.hollywoodreporter.com/live-feed/do-no-harm-premiere-date-395881
Sophomore drama Grimm will return to the schedule at 9 p.m. March 8.
I suspect that the Captain (being of the Royal Families) is Human. It was mentioned that the Royals used Wesen and then used the Grimm to keep the Wesen in line.