Ep 11. Till Death Do Us Part

Castle season 4 episode 11, titled "Till Death Do Us Part", opens with a happy occasion as Castle has finally popped the question to Beckett. But the engagement is short-lived as the couple is immediately thrown into a murder investigation. A bride collapses at the altar during her wedding ceremony and dies, prompting the team to look into her past in order to figure out who might have had a motive to kill her.

The investigation takes Castle and Beckett into the world of high-end wedding planners and designers, where they meet a number of suspects including the groom, his ex-wife, and the wedding planner. Their investigation is further complicated by the fact that the victim had a secret that could have led to her murder.

As Castle and Beckett dig deeper into the case, they begin to realize that the victim wasn't the only one keeping secrets. The groom had a motive for killing his bride that he was desperate to keep hidden, and the wedding planner had crossed paths with the victim in a way that could potentially implicate her.

The investigation takes a dramatic turn when Castle and Beckett are forced to attend a wedding expo in order to gather more information from potential suspects. While there, they discover a key piece of evidence that leads them to the identity of the killer.

In typical Castle fashion, the episode is filled with witty one-liners and playful banter between the show's main characters. The engagement of Castle and Beckett adds an emotional depth to the episode, as the couple has to juggle their personal lives with the demands of the case.

As the investigation comes to a close, Castle and Beckett must confront the reality of the danger that comes with their jobs. The episode ends with a heartwarming moment between the engaged couple, but also a reminder that their work will always be a source of danger and uncertainty.

Overall, Castle season 4 episode 11 is a thrilling and emotional episode that is sure to satisfy fans of the show. With a captivating murder investigation and the added drama of Castle and Beckett's engagement, the episode is a must-watch for anyone who loves a good crime-solving story with a touch of romance.