If you've watched the rest of the series then you won't gain anything new from this episode. It's a recap. Now, anyone who complains about it doing its job -- recapping the events of previous episodes -- is missing the point of the recap. It's not a stretch to say (based on the production errors in previous episodes) that the animation studio is struggling a bit to get this show out in good quality week after week. The reused animation and story in this is giving them a week more buffer time to prepare the upcoming episodes. This is a good thing as far asI can see. If you're just starting the series, feel free to skip this if you want to, you obviously will not miss anything as it is a recap of things already watched.