HBO have released titles and synopses for the first 3 episodes of Big Little Lies season 2, which starts in the US on Sunday:

Episode 2.01 – “What Have They Done?”:
Following first-day-of-school events, Madeline (Reese Witherspoon) is worried by Bonnie’s (Zoë Kravitz) behavior and, later, is shocked when Abigail (Kathryn Newton) says she doesn’t want to go to college. Mary Louise (Meryl Streep), Celeste’s (Nicole Kidman) mother-in-law, offers her unvarnished assessment of Madeline’s character. Jane (Shailene Woodley) learns from her new coworker, Corey (Douglas Smith), that she’s known in town as one of the “Monterey Five.”

Episode 2.02 – “Tell-Tale Hearts”:
Renata (Laura Dern) faces an uncertain future when Gordon (Jeffrey Nordling) lands in legal trouble. Corey (Douglas Smith) asks Jane (Shailene Woodley) out on a “practice” date. After a challenging therapy session with Dr. Reisman (Robin Weigert), Celeste (Nicole Kidman) opens up to Mary Louise (Meryl Streep) about her relationship with Perry. Bonnie’s (Zoë Kravitz) mom, Elizabeth (Crystal Fox), arrives. Ed (Adam Scott) confronts Madeline (Reese Witherspoon) about her secrets.

Episode 2.03 – “The End of the World”:
Mary Louise (Meryl Streep) tries to get closer to Jane (Shailene Woodley). Rather than address her troubles at home, Renata (Laura Dern) focuses her wrath on Principal Nippal (P.J. Byrne). Madeline (Reese Witherspoon) is forced to confront her issues at a couples therapy session with Dr. Reisman (Robin Weigert). Celeste (Nicole Kidman) remains conflicted by her memories of Perry.