Where can I watch “Castle” Season 8 Episode 18 online?

This page provides episode info and a legal-only guide. It does not host streams or downloads. Check official platforms and licensed services for availability in your region (US first).

Do I need to watch earlier episodes before “Trahisons”?

Watching earlier episodes in season 8 helps you follow the plot and character arcs leading into this episode.

Watch Castle Season 8 Episode 18 Online

“Trahisons” — Watch "Castle" Season 8 Episode 18 online in HD for free. Check streaming providers, cast, and episode details.

Apr 18, 2016 Season 8 Episode 18 44 min M

7.4 ★ ★ ★ ★ ★

12 votes

Castle Season 8

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Season 8 Episode 18 — Aired on Apr 18, 2016 • runs about 44 minutes.

Directed by Jessica Yu.

Written by Robert Bella.

Notable cast/guest names in this episode include Nathan Fillion, Stana Katic, Molly C. Quinn, Jon Huertas.

This page includes 1 official still(s) (when available) plus legal availability links.

Looking for “watch Castle Season 8 Episode 18 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

Hailey fait équipe avec Marcus Janek afin de s'introduire dans l'immeuble de la Manchester Energy et d'y installer un logiciel espion dans l'ordinateur du Vice-Président. À la Manchester Energy, Hailey découvre le corps de Marcus. Elle s'inquiète et tente de trouver des indices qui pourraient expliquer sa mort, mais elle découvre des indices pouvant l'incriminer et prétexte la contamination. L'identité de Marcus Janek est vite retrouvé par les policiers. Chez Richard, celui-ci fait une agréable surprise à Kate...