Ghostbusters actress Kate McKinnon is helping to resurrect animated kids show The Magic School Bus by starring in the planned Netflix revamp. The comedienne will voice teacher Fiona Frizzle in The Magic School Bus Rides Again, with her character serving as the sister to the original Ms. Valerie Frizzle, featured in the educational series in the 1990s, reports The cartoon classic was based on the books of the same name by Joanna Cole and Bruce Degen.