John DiMaggio is the mad voice genius behind some of our favorite cartoon characters ever: Bender from Futurama, Jake from Adventure Time, the Scotsman from Samurai Jack, Penny from Sanjay and Craig, and lately the grumpy Mr. Grouse from The Loud House. Hector holds on tight as the actor, comedian, and producer of the documentary I Know That Voice recounts his career and inspirations, and shows us why he's one of the best of the best.