Mary Mack: Mary Mack. Actress: Trover Saves the Universe. Mary Mack is an American comedian, musician, actress, and writer known for various cartoon voice over work and guest appearances on shows such as Conan and Last Call with Carson Daly. Her first television appearances came in 2008 on Comedy Central's Live at Gotham and NBC's Last Comic Standing. She has four comedy albums on iTunes, while an independent live video special is...