A hermit-like author idolized by Castle is killed, and Castle resolves to solve the murder.
Charlies recovers from his beating. Hodiak hands Charmain a case when the head USC cheerleader and girlfriend to the Rams’ hotshot quarterback is found beaten outside a bar. After a brick is thrown through the window, Hodiak looks for the man who's been harassing Shafe's family. Ken admits to Grace that Charlie holds something over him that could ruin their lives. Shafe aids Sam in getting a message to his son.moreless
A DEA raid goes badly and the FBI is asked to consult on it, but Abbott's put in a sticky situation when his old boss attempts to blackmail him into protecting the DEA.moreless
A former prison warden wants Walter to find the bullet to clear a death row inmate and Dr. Lance Sweets judges Walter's competency for working federal cases. Elsewhere, Willa finds herself in trouble at a beach party.moreless
Horatio has to find out how a family just vanishes into thin air.
After shooting a serial killer, Brenda is removed from active duty by the department psychiatrist. Instead, Brenda must take a journalist doing a story on the LAPD on a ride-along that turns deadly when the car she is in becomes the target in a shooting. As the key witness to the incident, Brenda must solve her own case while tolerating unwanted round-the-clock police protection.
Meanwhile, Brenda's parents come for a visit, and Fritz meets Brenda's father for the first time. But Brenda's not sure she wants to share one important piece of news with him just yet.