"Journey to the center of the Gus" is the 74th episode of the series and the 11th(b) of Season 3 of Robotboy. In this episode, Bjorn Bjornson has created a nano killer-bot and had put inside of a soap that he will send to Tommy in order to destroy him. Luckily for Tommy Gus eats the soap, and Robotboy has to save him from being exploded by the robot.