Devil in Diapers (S03E05)

In "Devil in Diapers," Mr. Mental snatches a gadget from Dr. Pendecker that enables him to hypnotize Arthur and the Tick into believing he is a helpless infant, prompting them to become his guardians. However, chaos ensues when Mr. Mental accidentally leaves the device in a taxi, forcing him to embark on a mission to retrieve it before his ruse is uncovered. The situation spirals as he navigates the challenges of getting back the crucial tool while maintaining his baby facade.