A triumvirate of voice over professionals -- Diane Pershing (the voice of Poison Ivy on “Batman: The Animated Series”), Marty Grabstein (the voice of Courage the Cowardly Dog), and Noel MacNeal (from “Bear in the Big Blue House”) -- share their experiences and tips for a career in the recording booth! Plus we take a look at Nerd Holidays! All in the jovial 28th episode of 1.21 Geekawatts!