As if we weren't excited enough for the second season of Big Little Lies , Meryl Streep had to go and take on the new part of Mary Louise Wright, the mother of the late Perry Wright (who, as you'll recall, spent the majority of season one abusing his wife, Celeste ). Now, it seems like Streep is bringing an even bigger mystery along with her for season two, and it has nothing to do with murder — just teeth.