On this week’s show: Liev Schreiber, star of the hit hit-man series “Ray Donovan,” brings stories of his dog days… A follow-up documentary from Oscar nominee Joshua Oppenheimer (“The Act of Killing”) looks into the eyes of mass murderers… Mega-producer Mark Ronson DJs our dinner party, gets us out of our seats… A requiem for summer, and siblinghood, from writer Amelia Gray… Brendan visits an Austrian “imbiss” shack — a sort of meat-and-greet… And the Posts let us eat cake (and sleep at work). Plus: the birth of Bugs Bunny, the garbage robots on the horizon, and the vegan you don’t want to meet at a party.