in England, is also a computer expert, and a friend of Fiona Frizzle's. Others Professor Cornelia C. Contralto II The curator and owner of the town's sound museum. She, like her great-grandmother Professor Cornelia C. Contralto I, is an expert in acoustics and vibration. The professor also helped Carlos develop and better his instrument, and find the perfect sound. Professor Contralto II is always looking to add to her great-grandmother's sound collection, and at the end of episode 8, "In The Haunted House", she annexed Carlos's new and improved instrument. Voiced by Carol Channing. General Araneus The main antagonist of "Spins a Web." A semi-retired general who plots to capture the giant Mantis in Stand By Your Mantis, an old horror movie that Ms. Frizzle's class magically enters. He attempts to use Liz as a bait for his Mantis trap but the class manages to stop him. He is voiced by Edward Asner. Molly Cule She's a famous rock singer and one of the original Frizzlettes (Ms. Frizzle's old band she used to tour with). The class got to wash her car in the episode "Meets Molly Cule." Wanda's also a huge fan of hers. Voiced by Wynonna Judd. Dr. Carmina "Bonesy" Skeledon A paleontologist who the class visits at a fossil dig up in "The Busasaurus". Voiced by Rita Moreno. Mr. Junkett Junkett is an African-American Vehicle Maintenance Inspector from the episode "Revving Up." As a minor antagonist, he accidentally leaves a peanut butter sandwich on the bus's carburetor (blocking air inflow), which then drips peanut butter into the bus's fuel line and cylinder's spark plug, which makes the bus break down. Voiced by Sherman Hemsley. Mr. McClean Voiced by Malcolm McDowell. The school janitor, who struggles to control the new automatic welcome system in "Gets Programmed". Rainforest Inspector 22 (formerly 47) He appears in "In The Rainforest", and inadvertently upset the ecological balance of the rainforest when he covered a mud wallow with artificial turf; upon correcting the problem, he was promoted to Inspector 22. There are also other rainforest inspectors, such as 1 and 46. Voiced by Matt Frewer. Radius Ulna "R.U." Humerus Ms. Frizzle's mechanic who appeared in "Flexes Its Muscles" and provided the M.I.K.E. to help the kids build RalphieBot. He is named for the three major bones in the human arm. He insists on being called "R.U." Voiced by Tony Randall. Mr. Garth Sinew