And here comes the for-now-final entry to Octonauts saga, The Octonauts: Ready for Action, which comes with the episodes 17 to 24. Also featured is the second special, Octonauts and the Great Christmas Rescue – because every TV show must have holiday special, I guess. While this is the last release currently on DVD, these three don't account for even the first series, which is 50 episodes long! And that's just the first series, the second one has been airing on-and-off through out 2013. So, expect to see more Octonauts in the future!