Where can I watch “Lost in Space” Season 3 Episode 7 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 Lost in Space Season 3 Episode 7 Online

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Oct 18, 1967 Season 3 Episode 7 60 min TV-PG

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Lost in Space Season 3

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Season 3 Episode 7 — Aired on Oct 18, 1967 • runs about 60 minutes.

Directed by Sobey Martin.

Written by Jackson Gillis.

Notable cast/guest names in this episode include Guy Williams, June Lockhart, Mark Goddard, Marta Kristen.

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

Looking for “watch Lost in Space Season 3 Episode 7 online”? This is a legal-only guide with synopsis, stills, and navigation for this season.

Synopsis

Before leaving their planet, the Robinsons meet a boy alien called J-5. They take him with them to return him to his home planet. They meet a strange ship, which turns out to be an earth ""lighthouse"" for lost ships. Thinking this ship will help them with extra fuel and star charts they celebrate, however when J-5 learns that they don't have enough fuel to take him home, he angrily sets about to destroy them all with a creation of his imagination. J-5 begins a new life at the lighthouse, and the Robinson's leave in the knowledge he will be looked after by the kindly, old lighthousekeeper.