Alas, we didn’t get to see any new areas of the temple. A wasted opportunity, perhaps: the temple is enormous, and could feasibly contain just about anything the writers could dream up. Maybe some day we’ll get to see more of it.
This was more of a character episode than a lore episode, so we didn’t learn very much.
As far as music is concerned, however, we’re definitely looking forward to when Secret Team‘s songs are posted.