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.
Visions of Harper bombard Ryan; if Harper still lives, Ryan must make a difficult choice: save him, or destroy him once and for all.
Ryan and the team, along with Veracity, must fight off an ooze-based zombie horde.
An item of immense power rests under the Bay, as does a terrifying new monster.
Ryan attempts to level up at his new school, but must instead focus to stop a super-powered enemy.
With the fate of Bay City hanging in the balance, Ryan and the team fight to end the monster threat once and for all.
The guys and MECH-X4 evade the authorities while trying to fight a monster unlike any other before.
The MECH-X4 team must stop the villain's final step in his plan to rule the world.
With help from his team and a dangerous new technology, Ryan goes on a mission into the mind of his enemy.
On the robot's first ever deep sea mission, Ryan and the team discover the terrifying truth behind the monsters.
As Harris' experiment at the science fair goes haywire with potentially explosive consequences, the school's MECH-X4 fan club threatens to reveal Ryan's secret identity.
Ryan's inner turmoil over a shocking personal revelation causes his power to short-circuit, endangering the city.
Ryan and the guys reluctantly join forces with an enemy to try and defeat a greater threat.
Ryan and the team must rescue Mark and reclaim their robot before it's destroyed.
Principal Grey sets a trap for Ryan, Harris and Spyder while they're on a camping trip, which leaves MECH-X4 and Mark in danger.
Harris convinces Ryan to join a skate competition; an upgraded flying Jaguasaur is deployed to lure the team and MECH-X4 into action.
Ryan uses his technopathic powers to access a powerful laser for the team to use and crack open the captive monster's heart.
When an ooze-infected Harris starts turning into a monster, the team goes on a mission to find a cure.
When monsters descend upon the Bay City High, Ryan enlists his two best friends, Spyder and Harris, and his brother Mark to help him operate MECH-X4 and save their school.