Where can I watch “Les Mystères de l'Ouest” Season 4 Episode 21 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).

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Watching earlier episodes in season 4 helps you follow the plot and character arcs leading into this episode.

Watch Les Mystères de l'Ouest Season 4 Episode 21 Online

“La Nuit du diamant” — Watch "Les Mystères de l'Ouest" Season 4 Episode 21 online in HD for free. Check streaming providers, cast, and episode details.

Mar 14, 1969 Season 4 Episode 21 TV-PG

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Les Mystères de l'Ouest Season 4

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Season 4 Episode 21 — Aired on Mar 14, 1969.

Directed by Marvin J. Chomsky.

Written by Robert E. Kent.

Notable cast/guest names in this episode include Robert Conrad, Ross Martin.

This page includes 2 official still(s) (when available) plus legal availability links.

Looking for “watch Les Mystères de l'Ouest Season 4 Episode 21 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

James West part chercher sur l’île de feu Joseph Bleak un diamant que ce dernier a légué au musée national de Washington. Il découvre une île hantée par les hurlements d’un chien sauvage et la discorde parmi les héritiers de Bleak, d’autant plus forte que le testament réserve quelques surprises. Enfin, un détective britannique le prévient de la présence sur l’île du docteur Calendar, un célèbre cambrioleur désireux de s’emparer du diamant.