With Ryan's help, Kaitlin interviews bikers about an upcoming charity ride. But when Ryan puts on a new helmet, he tries to run Kaitlin over. He then roars off, with Percy handing on. Later, J.B. and Kaitlin fight Skugs who melts away with a bike. Professor Hart suggest the bike might be a clue to Ryan's behavior. On the lab monitor, Ryan and the bikers are seen making havoc in the city. J.B. and Kaitlin track Ryan down, but CYCLETRON materializes from a bike and fights them. Afterwards, Kaitlin finds a helmet with a mind-control device. J.B. and Kaitlin, later, do battle with Cycletron at his headquarters where a possessed Ryan holds Percy captive. When J.B. pulls Ryan's helmet off, Ryan returns to normal and removes the helmets from the other bikers. Meanwhile, J.B. destroys Cycletron and saves the day.