Guest Stars Kari Wahlgren voices Roxanne Featherly Jim Rash voices Gyro Gearloose Lin-Manuel Miranda voices Fenton Crackshell-Cabrera / Gizmoduck Josh Brener voices Mark Beaks Jameela Jamil voices Gandra Dee Selenis Leyva voices Officer Cabrera Tom Kenny voices Dr. Atmoz April Winchell voices Security System