Season 4 (2018)
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Episodes 10
Ask the Dust
Three months after discovering a startling new lead, Det. Harry Bosch is still pursuing the truth behind his mother's cold case. A murder of a high-profile attorney puts the city on edge so Chief Irvin Irving creates a Task Force with Bosch in charge. Bosch must contend with two former adversaries.
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Dreams of Bunker Hill
Bosch pulls out all the stops to try and get to the bottom of the Elias murder as quickly as possible while keeping the IA investigators on his Task Force in the dark. Eleanor Wish is back in the game with the Feds, and Det. Jerry Edgar preps for his first day back on the job.
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Devil in the House
As the Task Force tries to clear the growing number of suspects, they discover a potentially explosive false alibi. Det. Santiago Robertson must put his personal relationships aside for the sake of the case. Edgar struggles rebalancing work and family. Bosch has an unlikely late night visitor.
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Past Lives
Det. Francis Sheehan comes clean to Bosch, Robertson suspects a leak in the investigation, and Edgar joins the Task Force. Social unrest surrounding the Elias murder grows and Irving is pressured to intervene. Eleanor asks Bosch for parenting advice and confesses the truth about her marriage to Reggie Woo.
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The Coping
Bosch struggles to manage all the things he's lost and to keep the darkness at bay, from himself, and from Maddie. The Task Force bears down on two suspects. Acting Captain Grace Billets gets tangled in station politics and petty opposition, no longer everyone's best friend.
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The Wine of Youth
The search for Sheehan intensifies, as pressure mounts to solve the Elias murder. The Task Force waits for ballistics to confirm their suspicions. Edgar and Bosch pursue an unofficial 'side project' in the San Gabriel Valley. Billets and Dets. Crate and Barrel respond to a suspicious hit and run in Hollywood.
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Missed Connections
Two off-duty patrol officers cause Billets more trouble than she needs while the protests heat up outside Hollywood Station. With a suspect in custody, the Task Force begins to wrap up the case, but Bosch remains unconvinced. Irving learns he's being played and Honey Chandler makes a surprising discovery.
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Rojo Profundo
The protest looming, Billets strikes a deal with the activists. Irving realizes that old friends are new enemies. Crate and Barrel solve the case of their careers. As the Task Force scrambles to salvage their investigation, Bosch finds himself in the depths of underground Los Angeles.
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Book of the Unclaimed Dead
Bosch and Sgt. Amy Snyder uncover a key piece of evidence that could compromise the entire Elias investigation. Edgar and Robertson are rocked by personal disappointment. Irving exposes his enemies. Bosch stalks the suspected Elias killer on his own, and comes face to face with his past.
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