Beckett lets Castle know that she never stopped believing in him. Still, she can’t convince the D.A. to delay the transfer out of the precinct. Officers arrive to take their prisoner away. Castle says he would give anything to be at the first place Beckett ever handcuffed him: The New York Public Library. Then he’s led out of the station by two uniformed cops, who are later deemed to be imposters. The fear is that Tyson now has Castle in his clutches, but the District Attorney is calling this a prisoner escape.
The manhunt is on for Castle, but Beckett knows exactly where he is. She understood his message back in the holding cell. Castle is waiting for her at the New York Public Library after successfully orchestrating his own prison break. They realize the man who bought the earrings was a celebrity impersonator hired by Jerry Tyson. They ultimately track down the building where Tyson was holed up. Inside, they find the materials he used for the frame job. It’s more than enough to clear Castle for the murder. But Tyson is nowhere to be found.
While stuck on a bridge, Castle thanks Beckett for believing in him. Then… SMASH! An SUV plows into them. BANG! BANG! BANG! Gunshots rip through the car. It’s Tyson. Beckett fires back hitting the killer in the chest. But Tyson’s wearing a bulletproof vest. He’s able to overpower Beckett. He wants Castle to watch as he kills her. BANG! BANG! BANG! Castle shoots Tyson multiple times until he falls off the bridge and into the water. They don’t recover the body. Castle believes Tyson is still alive. This was all part of his plan to disappear again. This isn’t the last he’s seen of the Triple Killer.