Overview: The Autobots go on alert as the Decepticons return to Earth in the series opener, Meanwhile a group of humans find themselves with new caretakers after stumbling into the middle of the Autobot conflict with the Decepticons.
Overview: The Autobots go in search of Cliffjumper, whose life signal is weak and find Megatron wielding the dangerous dark Energon.
Overview: Bulkhead is unknowingly shadowed by Miko as he goes to rescue Agent Fowler, who was kidnapped by the Decepticons.
Overview: The Autobots try to stave off an attack from Megatron's Terrorcons to protect their human wards.
Overview: The Decepticons and the Terrorcons go into battle against the Autobots.
Overview: Starscream pursues other interests while Skyquake battles with Optimus Prime and Bumblebee.
Overview: Scraplets invade HQ while Optimus and Arcee patrol the Arctic, leaving Bumblee and Ratchet to repel the enemy.
Overview: Bulkhead awaits a visit from his buddy Wheeljack, but his arrival does not go as planned.
Overview: The Autobots are attacked while helping Agent Fowler transport an implosion device.
Overview: Miko and Bulkhead go up against Starscream and Breakdown as they go to Greece to retrieve an Energon Harvester.
Overview: Jack tries to be impressive, with Bumblebee's help, but Knockout's arrivals sends things out of control.
Overview: Arcee must protect Jack when a routine mission is complicated by Airachnid's arrival.
Overview: A Decepticon plague infects Optimus Prime, so Arcee and Bumblebee sneak onto the Nemesis to find the cure.
Overview: Megatron controls Bumblebee from inside his mind and influences his behavior at HQ.
Overview: The kids are stranded with Skyquake in an alternate dimension during a GroundBridge malfunction.
Overview: MECH agents capture a Decepticon, and the Autobots mount a rescue.
Overview: Airachnid makes a deal with Silas to get revenge against Arcee and Jack.
Overview: The Autobots try to claim a magnetic weapon before the Decepticons get to it.
Overview: Two patrolling Autobots end up trapped in a cave with their enemies, Starscream and Megatron.
Overview: Starscream makes an unexpected request after he is captured by Optimus.
Overview: Bulkhead acquires a top-secret formula, and the Decepticons come after him for it.
Overview: Ratchet becomes a threat to everyone after he injects himself with an experimental substance.
Overview: The Decepticons quickly try to build a space bridge before a prophesied darkness arrives.
Overview: Earth has an outbreak of natural disasters, caused by Dark Energon.
Overview: The Autobots acquire a surprising ally in their battle to save Earth.
Overview: The Autobots go to the Earth's core to fight for the planet; and Jack uncovers info about Optimus' background.