Tom and Jun take a risk in revealing the secret of the Hidden Realm to D’Angelo to aid an injured dragon, and D’Angelo bonds with Plowhorn.

Tom has to keep his mom, Olivia, distracted while Jun, Alex, and D’Angelo use a new dragon to close off a cave leading to the Crystal Realm, and prevent her from discovering the dragons.

Tom and the riders go in search of Thunder and must face a gauntlet of dangerous dragons to find their lost friend. Along the way, Tom reveals his big secret to D’Angelo and Alex.

During an attempt to get displaced Fire Gronckles back to their native realm, D'Angelo accidentally feeds them Catastrophic Quaken eggs.

Alex and Eugene find themselves at odds with Tom and their fellow dragon riders when Feathers and Webmaster go missing during a blizzard in the Ice Realm.

Tom orchestrates a “safe” tour of the realms to convince Olivia that the Hidden World is safe for them to explore.

When the dragons fall victim to Buzzsaw’s poison darts, D struggles to keep a cool head and find a cure while others panic.

When Jun does a Tarot reading for the team, she interprets its meaning to be that the riders will disband! In an effort to defy this fate, Jun forces the group to stick together as they search for a dragon that has breached the Rakke Town eel barrier.

The Dragon riders enlist the aid of Carla and Hazel and their scientific knowledge to help them prepare for a mission to neutralize Jörmungandr so they can return him to his chamber and seal him back inside.