Special Guest Stars Al Gore voices Al Gore's Head Guest Stars Phil LaMarr voices Hermes Conrad Lauren Tom voices Amy Wong Frank Welker voices Nibbler Phil LaMarr voices Lionel Preacherbot David Herman voices Professor Ogden Wernstrum Lauren Tom voices Suzie Phil LaMarr voices Mr. Sunbeam Phil LaMarr voices Robot Crowd David Herman voices Randy's Partner David Herman voices Homeopathic Doctor David Herman voices Man in Street David Herman voices Robot Crowd