Primus (Transformers) the Transformers race. In the "Shattered Glass" universe, the idea of Primus, the benevolent Creator, was unknown to the heroic Decepticons until Cliffjumper, a visitor from the Positive Polarity universes, told them about him. Before long, Cliffjumper's "beliefs" were a subject of derision, especially among the evil Autobots. When Ultra Mammoth-the Ultra Magnus of Cliffjumper's reality-encountered the Vok on "Shattered Glass" prehistoric Earth, they took the form of Primus (mirroring the action of their counterparts in the "Beast Wars" cartoon) to mock Ultra Mammoth's attempts to bring order to a universe "founded on chaos." Cliffjumper was eventually vindicated, however, when
What Was Missing cry because the songs featured in the episode were so full of emotion. "Adventure Time" composer, Tim Kiefer, played the instruments featured in the episode himself. To complement the tones of the bass and viola, he created percussion sounds with Game Boy loops, and then used an autochord for "Princess Bubblegum's melodies" to make "pretty, melodic swoops to accompany BMO's rigid, robotic patterns, loops, and structures." "What Was Missing" first aired on Cartoon Network on September 26, 2011. The episode was viewed by 2.185 million viewers and scored a 0.4 Nielsen rating in the 18–49-year-old demographic. This means it was