Where can I watch Nick: Off Duty in United States?

Day in, day out, Niklas ‘Nick’ Tschiller and his partner Yalcin Gümer investigate crimes that are happening in Hamburg. But at some point even the policeman needs a break to spend time with his daughter Lenny. Then it says: Tschiller a.D. - out of service - goodbye to Hamburg. However, simply relaxing is easier said than done, because crime never sleeps and a new, very personal case throws a spanner in the works for Nick's plans for a well-deserved break. Even on vacation, the criminal investigator is not sure about his job and so a wild journey soon takes him across Europe, including to Istanbul and Moscow.