Ep 19. Habeas Corpse

In Castle season 7 episode 19, titled "Habeas Corpse," Castle and Beckett investigate the death of a inmate at a prison. The inmate, a notorious killer with a penchant for hacking, was in the process of revealing the location of a stolen fortune when he was killed. As Castle and Beckett delve deeper into the mystery, they discover that the inmate had been working with a group of hackers called "The ThreeXes" to take down a corrupt corporation.

With the help of the ThreeXes, Castle and Beckett are able to track down the stolen fortune and uncover a web of corruption that goes all the way to the top. Along the way, they must navigate the dangerous world of prison politics, while also dealing with personal matters. Beckett struggles with balancing her job and her relationship with Castle, while Castle tries to figure out how to convince Beckett to take their relationship to the next level.

As the investigation heats up, Castle and Beckett find themselves in more danger than ever before, and they must use all of their skills and resources to solve the case and bring the corrupt individuals to justice. Along the way, they discover the true extent of their love for each other, and must confront the possibility that their future together may be in jeopardy.

"Habeas Corpse" is a thrilling and intense episode that showcases the best of Castle and Beckett's partnership. With a complex case and plenty of action, it is sure to keep viewers on the edge of their seats until the very end.