After Buzzsaw injures a water dragon, the Riders go against their parents' wishes and "borrow" a bathysphere to travel to the deepest part of the Giant Realm Sea to rescue it.

Dragons: The Nine Realms Season 6 Episodes...

• s06e01 - Dragons Everywhere
• s06e02 - Break in Case of Emergency
• s06e03 - Undercover
• s06e04 - Webs' Masters
• s06e05 - Sledkin Stakeout
• s06e06 - Poison Control
• s06e07 - In Too Deep

Dragons: The Nine Realms Show Summary

Set 1,300 years after the events of How To Train Your Dragon, dragons are now just a legend to the modern world. When a geological anomaly opens up an immense, miles-deep fissure in the Earth's surface, scientists from all over the world gather at a new research facility to study the mysterious phenomenon. Soon a group of misfit kids, brought to the site by their parents, uncover the truth about dragons and where they've been hiding - a secret they must keep to themselves to protect what they've discovered.