When a bot's series reaches a certain age, Hasbro's need to sell new toys of them triggers strange and startling changes in their body -- it's time for Heatwave to get a new mode, for Reasons! But while he's away going through some vague physiological process under Optimus Prime's supervision, Doctor Morocco returns to wreck havoc on Griffin Rock with a souped-up weather machine (and not the yummy kind of soup)! Can the other Rescue Bots hold down the fort against storms, lightning, and FIRE TORNADOS? How does Heatwave's new mode rank against a fire department Lamborghini? And Doc Greene's tornado-stopping machine is called WHAT!? Join us this week for "Changes"!