Along with Kup and Bumblebee, he suspects that something is amiss with the inhabitants of the planet Aquatron, and takes a small drops ship down into the planet's oceans to investigate. The trio is captured and brainwashed by the Quintessons, who force them to testify against Optimus Prime in a mock trial. Fortunately, they are later returned to normal and return to space aboard the Ark with the rest of the Autobots. Retribution