Where can I watch “Star Trek” Season 3 Episode 22 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 3 helps you follow the plot and character arcs leading into this episode.

Watch Star Trek Season 3 Episode 22 Online

“La Frontière” — Watch "Star Trek" Season 3 Episode 22 online in HD for free. Check streaming providers, cast, and episode details.

Mar 7, 1969 Season 3 Episode 22 51 min TV-PG

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Star Trek Season 3

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Season 3 Episode 22 — Aired on Mar 7, 1969 • runs about 51 minutes.

Directed by Herschel Daugherty.

Written by Gene Roddenberry, Arthur Heinemann.

Notable cast/guest names in this episode include William Shatner, Leonard Nimoy, DeForest Kelley, James Doohan.

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

Looking for “watch Star Trek Season 3 Episode 22 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

Sur la planète Excalbia, une créature du nom de Yarnek "invite" Kirk et Spock à combattre en compagnie de deux figures légendaires Terrienne et Vulcaine (Lincoln et Surak) autre figure légendaire ennemies Terrienne et Klingonne. Les habitants d'Excalbia espèrent ainsi connaître les notions de "bien" et de "mal" qui régissent les humains.