Ep 18. Backstabber

In Castle season 8 episode 18, titled "Backstabber," Beckett and Castle investigate the murder of a tech CEO who was found dead in an alley. The victim, named Trent Staley, was known for being a cutthroat businessman who didn't hesitate to fire employees who didn't meet his expectations. As the investigation unfolds, the detectives discover that Staley had plenty of enemies, including his investors, ex-girlfriend, and former employees.

As Beckett and Castle dig deeper into Staley's personal life, they learn that he was involved in a complicated love triangle. The victim was still in love with his ex-girlfriend, who happened to be his former business partner. However, she had moved on and was engaged to another tech CEO, who also happened to be Staley's biggest rival.

The case takes a complicated turn when evidence suggests that the victim's ex-girlfriend might be the killer. However, as Castle and Beckett investigate further, they realize that the evidence has been tampered with and that someone is trying to frame the ex-girlfriend.

As they try to uncover the true culprit, Beckett and Castle find themselves in a dangerous situation. The killer is out there, and they need to catch them before it's too late. Will they be able to solve the case before more lives are put in danger?

Meanwhile, Castle's private investigation into his mysterious disappearance continues. He receives a lead that takes him to a surprising location, but his efforts to uncover the truth might put him in harm's way.

Backstabber is an intense and thrilling episode that keeps you on the edge of your seat until the very end. The case is complicated and full of twists and turns that will keep you guessing. The relationship between Beckett and Castle is also at the forefront, as they continue to work together to solve cases and uncover the truth about Castle's disappearance. As always, the chemistry between the two leads is palpable, making this one of the most exciting episodes of the season.