Season finale. Kinder Garten's fury rips across the island, sending Cal, Apollo, and the others out into the darkness.

Lillian reckons with a dark night from her past and records a message for her son, Apollo.

Emma finds Cal and the Wise Ones on North Brother Island, where she pieces together clues to locate a special place.

The mysterious washerwoman's ominous words leave a lasting impression. Apollo comes face-to-face with his true enemy.

 Apollo and Patrice make a sale to William Wheeler, who later gives Apollo stunning news.

Emma does the unthinkable. Apollo tries to find meaning in the aftermath—and finally decides what to do with his valuable book.

The exhaustion of new parenthood is taking its toll on Emma and Apollo. To make matters worse, Emma starts getting strange texts.

A bookseller from Queens meets a librarian from Virginia. They fall in love, marry, have a baby—and trigger an unimaginable series of events.