There are 22 episodes all together. 13 episodes have aired i the U.S and right now their on a hiatus till April then they're back there will be the last 9 episodes to air.
Right now here in the UK only 8 episodes have aired so far.
So far there is only 13. When it comes back from hiatus in the US there will be the remaining 9 episodes. So altogether there are 22 episodes. And a 秒 season has been ordered. YAY:))