The "punking" isn't just limited to the crime scene; both Castle and Beckett are dealing with major shifts in their personal lives:
The episode ends with a massive shock for Castle: the introduction of Josh , Beckett's new motorcycle-riding boyfriend. Watching Castle’s face fall as he realizes he has competition is a gut-punch to "Caskett" fans everywhere. Fun Facts for Fans
Are you a fan of the show's more , or do you prefer the grittier police procedurals ? Castle season 3 episode 4 review: Punked | Den of Geek
The episode concludes with a dedication to the legendary Stephen J. Cannell , a real-life author and friend of the show who frequently appeared in the "writer's poker" scenes.