Quick Summary
Nikki Heat – The actress playing Nikki Heat in the film version of Castle’s Heat Wave teams up with Beckett and the author to solve a murder, with Laura Prepon guest‑starring.
About This Program
Programme Overview
Nikki Heat is a special episode presented on Great! Mystery, blending the intrigue of a classic murder investigation with the charm of a beloved literary adaptation. Classified as an episode‑type drama, this instalment brings together the world of the popular Castle series and the cinematic portrayal of the Nikki Heat novels, offering UK television viewers a unique crossover experience.
What to Expect
In this compelling hour, the actress who embodies the titular detective Nikki Heat in the film version of Heat Wave steps onto the screen alongside Detective Beckett and the author himself. Together they delve into a fresh murder case, combining Beckett’s sharp investigative instincts with the author’s narrative insight and Nikki Heat’s on‑screen tenacity. The episode maintains the brisk pacing and clever dialogue fans have come to expect, while delivering a fresh perspective on the crime‑solving formula.
Guest Star Highlight
The episode is further enriched by a guest appearance from Laura Prepon, whose performance adds an extra layer of intrigue and star power. Prepon’s role, while not central to the core investigation, provides memorable moments that enhance the overall drama and keep viewers engaged throughout the storyline.
Why Watch
For British audiences seeking a blend of mystery, drama, and familiar characters, Nikki Heat offers a perfect addition to the Great! Mystery lineup. The episode appeals to long‑time fans of the Castle franchise, admirers of the Nikki Heat novels, and anyone who enjoys well‑crafted murder mysteries with a touch of literary flair. Its concise format makes it an ideal choice for an evening of entertaining, thought‑provoking television on UK screens.
Castle broadcasts on Great! Mystery at 11:10am, Wednesday, 5 November 2025.

