In "Limelight," the investigation into a pop star diva's death takes a turn when the investigation reveals the victim was a decoy.
The murder of a young video store clerk takes a strange turn when the team discovers his past history as a high-level hacker.
Castle and Beckett discover that the victim of a building fire was actually shot to death, they get on the trail of a serial arsonist turned murderer.
A bleeding man stumbles into a church, but just before dying, he hands a mysterious bundle to the priest. When the bundle turns out to be a smiling baby boy, Castle and Beckett find themselves accidental nannies to the newborn.
When a murder victim who looks like Lanie is found, the team suspects they're being targeted by a serial killer.
When a famed relationship therapist is murdered, it appears that her access to the secrets of her elite and powerful clients led to her death.
In "Like Father, Like Daughter," Alexis seeks the help of her dad to clear a man who's just 72 hours way being executed.
In "Get a Clue," Castle and Beckett investigatin the ritualistic murder of an accountant and learn there's more than meets the eye to her death.
A suspect (Joshua Gomez) in a grisly murder claims he has traveled back in time to prevent terrible events from unfolding.
In "Number One Fan" Castle negotiates with a troubled murder suspect who claims she's innocent.