DRAMA, 10.15PM, SCT Local audiences have proven slow to embrace US political dramas – a pity because this one’s top- shelf. So much is happening – all of it intriguing – in this episode that it’s a challenge keeping up. Flashbacks give new insight into the past of President Fitzgerald Grant ( Tony Goldwyn) and First Lady Mellie. No wonder their marriage is so deeply dysfunctional. Just as compelling are events in the life of Olivia ( Kerry Washington), who faces the awful truth about the plane crash that claimed her mother.