Bumblebee is ordered to to guard headquarters while Wheeljack works on….something. Hound reports back to Optimus Prime, who takes a team to intervene. Due to Teletraan-1 being out of action, Spike and Hound are out on patrol looking for potential Decepticon activity, and they discover them at the plant. As Teletraan-1 is damaged, the request for help doesn’t get through. The Decepticons attack the power plant, and the humans try to contact the Autobots for help. Optimus Prime tells Wheeljack that the Dinobots are too dangerous to be activated again, and the Autobots seal them in the previously revealed cave. The Dinobots cause so much damage that Optimus decrees that they must be destroyed, however Wheeljack manages to shut them down with his Magnetic Inducer. Just as Wheeljack is explaining that they are working on improving this, the Dinobots go haywire and start rampaging inside Autobot Headquarters, causing chaos and damaging Teletraan-1. The Dinobots demonstrate their abilities to the Autobots and we learn that they have simple brains, just like real dinosaurs.

Wheeljack and Ratchet introduce Grimlock, Slag, and Sludge (the Dinobots) to the Autobots. Meanwhile, the Decepticons plan to attack the waterfall power plant that Soundwave and Reflector gathered data on, so they can use it as an energy source. The Autobots discuss how useful dinosaurs could be in the fight against the Decepticons, so Wheeljack and Ratchet are given permission by Optimus Prime to attempt to build some. Hound is able to create a hologram depicting dinosaurs, and they marvel at their power. Spike takes the Autobots to a museum to lean more about dinosaurs. They fly back to Megatron to give him their report. The scene shifts to a water powered plant at the Great Falls, where soundwave and reflector are gathering data. This intrigues the Autobots, and Prime suggests that Spike continues to educate them about dinosaurs. They discover that the tremors are strongest behind a wall of rock at their headquarters, which they open up and find a cavern laden with dinosaur fossils.

SOS Dinobots opens with the Autobots deliberating over the cause of tremors that they are feeling. “No Decepticreeps, but there is something weird in there….”

Power of the ancients dinobots