I don't think he ever appeared on The Best Show, but Tom did an episode of Harris' Analyze Phish, which was pretty hilarious. Harris Wittels was a writer and co-executive producer for Parks and Recreation, a standup comedian, and creator of #humblebrag. He was a great comedic mind and died too early at the age of 30 after struggling with drug addiction. He has done innumerable funny podcast appearances on Comedy Bang Bang, Analyze Phish, WTF, and more. He was a great joke writer and I hope they never pull his Twitter feed down because reading it brings me so much joy.
RIP Harris Wittels, FOT.