Guest Stars Liam O'Brien voices Professor Maelstrom Michael Hawley voices Zack Abby Trott voices Ivy Sharon Muthu voices Dr. Bellum Dawnn Lewis voices Chief Rafael Petardi voices Chase Devineaux Paul Nakauchi voices Shadowsan Michael Goldsmith voices Gray Trevor Devall voices Roundabout Rhys Darby voices Neal the Eel Liam O'Brien voices Acme Analyst Sumalee Montano voices Lady Dokuso Sumalee Montano voices Tea Server James Sie voices Mr. Li Krista Marie Yu voices Xifeng Liam O'Brien voices Greenshirt Trevor Devall voices Acme Agent Trevor Devall voices Oxtail