HBO, 10:00 p.m. ET
Part 2 of 2. Last week’s episode, the start of a two-parter, had to do with a major power outage plunging the network’s New York newsroom into relative darkness. That story line continues this week, but makes room for another one – in which, in this show’s recent-past timeline, the cable news network gets to host one of the debates for the aspiring Republican presidential candidates. Standing in for the candidates at a test run-through? Some of the show’s producers and other staffers, as political operatives watch warily.