I enjoyed this episode quite a bit. The story involves Vance and Parker in Berlin tracking down some bad guys with support coming from everyone else at the Navy Yard. With those two out of the office, McGee gets to be Acting Director and, plot twist: he likes it!
My one ongoing complaint about NCIS is that Northern Virginia and the Shenandoah looks an awful lot like Riverside County or, maybe, San Bernardino. In this case, however, the interiors for a hotel, hospital, and warehouse look and feel like Germany. I'd love to know where they found the house, though, because it does not look like anything I've ever seen in the San Fernando Valley.
Apart from that, I do not speak German, but I could hear the fading in and out of the actors speaking German. I will say NCIS does this much better than Murder She Wrote with the bad fake English, Irish, and Aussie accents. And, to be honest, I think the producers' choice to spend money on salaries and production value over time spent abroad is a good one.
One last thing: I hope by the time you read this that whoever left a rating after watching 10 mins of the episode has changed what they initially posted. Don't review a show if you haven't watched it, please!