Season one of HBO’s “Big Little Lies” was a slow burn. Season two is an inferno. After the first season’s shocking end, a group of mothers — an all-star cast including Reese Witherspoon, Nicole Kidman and Laura Dern — come to terms with their new lives while their old ones fall apart. The irony is up, and so is the drama (the plot thickening with a suspicious mother-in-law played by Meryl Streep). Catch up by streaming the series on HBO GO or HBO Now.