I wonder if asking 'where next?' is going to become some sort of signature sign-off for the show. It's certainly a fun way to end things, and makes you interested for the next episode. That'll be the case even more when they can actually travel through time again, but as it stands it's still fun seeing the different places they go to, from USA to Norway. Vandal Savage is a very global villain, so it's pretty feasible that he could pop-up just about anywhere, while the various items and pieces of information they're searching for are equally spread out. They can go to any place in the world they want, so where next?