In "TransWarped", Ultra Magnus realizes that the uprisings were too organized and deduced that Cybertron may have a double agent. He then sends Sentinel and Jazz to Earth to get an update from the Earthbound Autobots. In "Where Is Thy Sting?", Longarm Prime (Shockwave) is outed as the traitor, and Magnus is savagely attacked and barely able to reveal the identity of his attacker to Ironhide. According to in "Decepticon Air", Ultra Magnus is currently on "spark-support". By this time, Sentinel Prime takes over as the new Magnus. In "This Is Why I Hate Machines", the attack by Shockwave and the image of Ultra Magnus in the infirmary are used as propaganda in Sentinel's fanatical government policies. While on spark-support, Ultra Magnus is nearly destroyed by his own hammer when Shockwave attacks the infirmary, but is saved by Ratchet, who takes the hammer with him to Earth and promises to return it once Ultra Magnus recovers.