The young girl Bosch and Maddie meet at the beach is Titus Welliver's daughter, Cora Welliver.
The episode title is a reference to the main character's personal mantra from the books: "Everybody counts, or nobody counts."
At 11 minutes 30, the names of the production crew are on the registry of the hotel linked to the murder of Bosch's mother. Brennan Peters, Will Potenberg, John Sanchez, Sofie Dejus.
When Bosch is looking at his mothers murder book at the 00:14 mark you can see on the case report listing the things found on his mother at the time that they spelled earrings wrong.