Big Little Lies Season 2 Episode 1 What Have They Done? ( Air Date 2019-06-09 ) Genre Drama category. Overview "Following first-day-of-school events, Madeline is worried by Bonnie's behavior. Mary Louise, Celeste's mother-in-law, offers her unvarnished assessment of Madeline's character. Jane learns from her new coworker, Corey, that she's known in town as one of the “Monterey Five.”".