When a band of Pteracopters crash-lands in the crater, the Dinotrux help them rescue a friend who's been taken out by stealth Scrapadactyls.
After five long years apart, Klaus attempts to reconnect with his daughter, Hope. Even as father and daughter bond, the rest of the family is still in turmoil. Elijah mediates a conflict between Hayley and Freya to determine the best way to protect the family. Meanwhile, in New Orleans, Vincent tells Marcel terrible secrets about his ex -wife, Eva Sinclair, even as they begin their search for a mysterious witch who plans to sacrifice a group of innocent children including Hope Mikaelson.
A free weed sign draws a bunch of stoners to the shipping container, where the boys face off with Lahey, Randy and a pair of cops.
Garby has to develop confidence as a leader when he's left in charge of the Flatirons while Ty and the others are stuck far away from home.
Click-Clack climbs out of his comfort zone to make sure his ideas are heard when the Dinotrux hatch a plan to stop D-Structs from stealing supplies.
All hell breaks loose on the ocean as the boys prepare for the drop-off while trying to find Bubbles and avoid Lahey and Randy.
A group of Trux displaced by a volcano comes to Ty for help, and the gang has to work together to build a bridge to welcome their new guests.
When the crew gets stuck on a sheet of thin ice, they run into a group of Picktools, which appear to be trying to crack the ice around them.
While trying to get home from a snowy area north of their crater, the gang meets a lonely but helpful Trux named Snowblazer who helps them navigate.
Another student sabotages Hannah during a class project. Clay's nightmares about Hannah spill over into the daytime.
A distraught Hannah gets a ride home from the party. Jessica's behavior grows increasingly erratic, and Clay learns the truth behind a tragedy.
Lisa Kudrow from Friends stops by, and the queens are challenged to perform in an epic cheer battle. With guest judges The B-52s.
As World War II begins, five of Hollywood's top directors leave success and homes behind to join the armed forces and make films for the war effort.
Hannah makes friends with Jessica and Alex, two other new students. Justin doesn't show up at school, and Hannah's mother finds something troubling.
The boys' deal with Snoop Dogg hits a snag when they're accused of killing Lahey and Randy, then everything goes haywire with Cory and Jacob.
Now in active service, each director learns his cinematic vision isn't always attainable within government bureaucracy and the variables of war.
After fighting gets them stuck in a dangerous situation, enemies Skrap-It and Ton-Ton must join forces to save themselves.
Mandy job shadows Mike and causes a dispute between Chuck and Joe, but her conflict-resolution skills differ from Mike's. Meanwhile, Kristen and Eve invite Vanessa to their kickboxing class so she can blow off some steam.