In “Knockdown,” we learned Hal Lockwood is deeply-connected to the murder of Beckett’s mom. During her weekly visit to the prison, Beckett discovers the hired assassin has been transferred to general population where he promptly kills Gary McAllister, one of three police officers who kidnapped mobsters for ransom back in the day. The other known dirty cop was the deceased John Raglan, the lead investigator in Beckett’s mom’s case. Someone very powerful is looking cut off all avenues of the investigation.
BOOM! A flash bomb is detonated at Lockwood’s arraignment. It’s chaos in the courtroom as the prisoner makes a daring escape by helicopter. Castle believes there’s a third renegade cop out there who can bring down the mastermind of the kidnapping scheme. This third cop could be Lockwood’s next target. The chopper is found in a hangar in Jersey. It was stolen and returned before anyone knew it was missing.
An officer named Chuck Ryker may have aided in Lockwood’s escape. He’s found with a bullet to the head. The payoff money Ryker received bounced through banks in Dubai. This case is much bigger than just the kidnapping of mobsters in back alleys. Beckett thinks the third cop is the one pulling all the strings. Castle realizes old arrest reports were altered in the records room years ago.