This week: Actor Jason Segel turns over a new leaf, as David Foster Wallace, in the biopic “The End of the Tour”… Etiquette (and karaoke) tips from rock star writer Diablo Cody (“Ricki and the Flash”)… Bobcat Goldthwait remembers Barry Crimmins, the man who brought conscience (and anger) to comedy… A taste of haute cuisine baby food, courtesy of the novel “The Kitchens of the Great Midwest”…Breakout musician Thundercat adds some crazy to the party…Plus: incendiary stoplights, magnetic moss, and more!