Ricky mistakes a sick-looking Jacob for a zombley, while Bubs thinks he's an alien. The boys make Cory and Jacob steal fertilizer from a farmer.
Bubbles and Ricky are doing well with their new pizza sauce company, but a new opportunity arises when they get a tip on where Julian's been living.
When Ricky gets shot in the groin by Mo, the boys argue over what kind of medical attention -- if any -- he should receive.
Ricky has a meltdown trying to process information he learned from Lahey. The boys have to get Bubbles's truck back from George Green.
A ruthless hit-man takes out an entire charter plane, but for Harry and the team his motivation is a mystery. Can Harry decipher the target before he strikes again
Ricky's injury isn't healing properly, so the boys head back to see Sam Losco. Ricky takes drastic action when the power gets shut off at the rink.
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.