This week: “The Office” co-creator Stephen Merchant spars with Brendan… fashion guru Simon Doonan advocates mullets… humorists Dave Barry & Alan Zweibel (attempt to) read their epic epilogue… The soundtrack of The War on Drugs… Artist Chris Burden’s slot-cars on steroids… And Rico digs into Frito Pie. Plus: silent senators, illin’ crosswords, and far-out jokes.