Decepticons Attack! - S1.E13

Optimus Prime has a meeting with his Autobots to plan a final confrontation with the Decepticons.

Megatron derails a train he thinks is carrying the Autobot prisoner Soundwave. In reality, the train only contained a hologram of Soundwave as a ruse to lure the Decepticons into a trap. Optimus Prime arrives and fights Megatron. The Decepticons discuss leaving Megatron on his own when Ironhide, Bumblebee, and Ratchet show themselves. Mindwipe tries to hypnotize Bumblebee, but Bumblebee covers his ears and talks over Mindwipe's voice, nullifying the effect. Megatron throws a train car at Optimus, who then does a badass flip over it. Bludgeon fights Ratchet. Starscream fights Ironhide. A small army of the Autobot's human allies then surround the battlefield.

Optimus Prime gives each Decepticon a choice. Leave Earth or be destroyed. To Megatron's surprise, Starscream, Bludgeon, and Mindwipe comply and leave. Optimus Prime is not surprised, since Megatron has been displaying poor leadership skills. Alone, Megatron also leaves Earth, but not before a parting threat to the planet.

Bumblebee stamps out a gigantic Autobot insignia in the dirt as a reminder to the Decepticons.