S1·E5 Assassin

Against the rolling sphere that continues to destroy the city, Joey and the others could do nothing but barely hold its progress. Joey is determined to not leave the Skrugg alone, and leaps into the fray again even without a plan, while Prof. Denton gives a guitar weapon to Psy that he created using the Skrugg's weapon. Joey and Psy head into the city with the weapon in hand, and they come up with a new plan to go up against the huge number of Skrugg. But before them a new threat comes calling...