[s5e5] Probable Cause -504 Murder, He Wrote -

It is eventually revealed that Tyson hired a Richard Castle lookalike (played by Nathan Fillion's actual stunt double) and meticulously breached Castle's security to plant the evidence.

The story centers on a mountain of planted evidence that makes Castle look like both a murderer and a cheater: [S5E5] Probable Cause -504 Murder, He Wrote

Damning emails and deleted novel scenes depicting the exact murder are discovered on his hard drive. It is eventually revealed that Tyson hired a

Reviews for this episode are generally positive, highlighting its intensity and character development: Tyson falls into the river

The episode reaches a climax on a bridge where Castle and Beckett confront Tyson. Despite being shot multiple times, Tyson falls into the river, and his body is never recovered—a classic "never found the body" trope that allows him to return in later seasons.