Ep 5. Eye of the Beholder

In Castle season 4 episode 5, titled "Eye of the Beholder," Castle and Beckett find themselves in the world of high-end art when a wealthy museum benefactor is found dead in her mansion. The investigation takes the detectives from the glamorous society events thrown by the city's art scene to the shady underground world of art forgery and theft.

As they delve deeper into the case, Castle and Beckett encounter a web of secrets and lies within the art world, including a corrupt art collector, a suspicious art dealer, and a potentially stolen painting worth millions. They must navigate this complicated world and separate truth from fiction to solve the murder before another victim is claimed.

Meanwhile, Castle is also dealing with relationship woes as he tries to get over his recent breakup with his ex-wife and rekindle his romance with Beckett. He struggles to balance his personal life with his work as a novelist and detective, and must decide whether he is ready to commit to a serious relationship.

As the investigation heats up, tension mounts between Castle and Beckett as they butt heads over their differing opinions on the case. But in the end, they must put aside their differences and work together to bring the killer to justice.

"Eye of the Beholder" is a thrilling episode filled with suspense, drama, and romance. It showcases the show's signature blend of mystery, humor, and heart, and keeps viewers on the edge of their seats until the very end.