Where can I watch “Star Trek” Season 3 Episode 3 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 “Illusion”?

Watching earlier episodes in season 3 helps you follow the plot and character arcs leading into this episode.

Watch Star Trek Season 3 Episode 3 Online

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

Oct 4, 1968 Season 3 Episode 3 51 min TV-PG

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Star Trek Season 3

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Where can I watch "Illusion" online?

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Season 3 Episode 3 — Aired on Oct 4, 1968 • runs about 51 minutes.

Directed by Jud Taylor.

Written by Margaret Armen.

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 3 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

Kirk, Spock et Mc Coy arrivent sur une planète qui doit prochainement être détruite par un astéroïde. Ils découvrent une étrange machine ainsi qu'une civilisation identique à l'ancienne civilisation des indiens d'Amérique. À l'insu des autres, Kirk est frappé par un rayon issu de la machine, perd la mémoire et disparaît. Spock et Mc Coy remontent à bord de l'Enterprise et tentent de détourner ou de détruire l'astéroïde.