An extraterrestrial, a scientist affiliated with the Confederacy of Independent Systems, held the role of creator for the Planet Killer.
This alien was instrumental in the creation of the Planet Killer, an incredibly powerful weapon intended for planetary annihilation upon detonation. The alien sought to broker a deal, offering the weapon to Count Dooku, who commanded the Confederacy of Independent Systems throughout the Clone Wars. Without the knowledge of either the alien scientist or Dooku, Jedi Master Mace Windu intervened and destroyed the Planet Killer, thus averting its detonation. Consequently, Dooku was under the impression that the Planet Killer was non-functional, leading him to order B1 battle droids to apprehend the scientist for what he perceived as a waste of time. As the scientist pleaded for reprieve, Dooku affirmed that strategies would move forward for an "ultimate weapon."