A super-charged Mech-X4 races around the world to defeat Traeger's beasts, and Ryan must make one of his toughest decisions yet: save his friend or save the world?

Ryan and the team must fight off a zombie horde.

When a new monster creates a city-wide blackout and disables the MECH-X4, the team must figure out how to get the robot working again to stop the beast from completing its mission.

The team has their first real battle with Traeger while Leo is confronted with his past.

Ryan and the team take MECH-X4 to the Arctic for an epic showdown with Traeger.

Ryan is bombarded by visions of Harper. If Harper is still alive, Ryan must make a difficult choice: save him, or destroy him once and for all?

Ryan and Mark's fun day with their Dad is interrupted when a fighter drone created by Harris is mysteriously reprogrammed to destroy Ryan.

Veracity's first mission with the team could be her last when her attempt to give Mech-X4 a flight mode goes terribly wrong.

After a successful mission, the team finally gets a little chill time in Mech-X until they find a bomb on the X-Deck!

Ryan, Spyder, and Veracity attempt to sneak into a hospital to get the materials they need for a secret mission.

Ryan's attempt to level up at his new school is interrupted when the team must stop a super-powered enemy.

Ryan finally gets a lead on his biological father, Randall, only to find him in mortal danger and must race against time (and a collapsing mountain) to save him.

An item of immense power rests under the Bay, as does a terrifying new monster.

Mark and others find Ryan in the top half of the robot. He is alive but very weak.

Ryan meets more of Leo's technopathy test subjects, including his birth mother.

Grace might relocate the family to Miami.

When the team split apart as Grace contemplates leaving Bay City, Traeger makes his move.

A traitor on Mech-X4 picks off unsuspecting team members one by one.

Ryan and what's left of his team take on Traeger and a traitor in Brazil.

With the world falling one city at a time, Ryan and the team retreat to the Thirty's secret farm.