Lost in Space: Season 1, Episode 2

The Derelict (22 Sep. 1965)

TV Episode  -   -  Adventure | Comedy | Family
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Ratings: 7.2/10 from 75 users  
Reviews: 5 user | 1 critic

The Jupiter 2 is pulled into a giant ship occupied by bubble like creatures.


(as Alex Singer)


(teleplay), (story), 1 more credit »
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Title: The Derelict (22 Sep 1965)

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Episode cast overview:
Will Robinson (as Billy Mumy)


Heat from an approaching comet nearly spells doom for Maureen and John who are stuck outside the ship after a rescue and repair operation. Afterwards, Will and Dr. Smith make a first-contact encounter with aliens when a gigantic and seemingly derelict spaceship pulls the Jupiter 2 inside itself. Written by statmanjeff

Plot Summary | Add Synopsis




Release Date:

22 September 1965 (USA)  »

Company Credits

Show detailed on  »

Technical Specs


Sound Mix:

(RCA Sound Recording)

Aspect Ratio:

1.33 : 1
See  »

Did You Know?


Later, in Prisoners of Space, the encounter with the "bubble creatures" is replayed within a tribunal setting in which a bubble creature sits in judgment of the Robinsons. See more »


In the opening scenes when John Robinson is floating outside the ship, he drifts in random directions, going back and forth, without any way of changing his direction. See more »


[the roused alien gives off an electrical discharge, quite possibly its manner of communication]
Dr. Zachary Smith: What do you suppose THAT means?
Will Robinson: I don't know. I don't think it likes being asked to guide us anywhere.
Dr. Zachary Smith: Let me try.
Dr. Zachary Smith: [to alien] Uh, we are from the planet Earth. Uh, we're perfectly willing to stay here if you show ME how your guidence system can get us back there.
Will Robinson: But we don't WANNA go back there to Earth, Dr. Smith. We wanna go to Alpha Centauri.
Dr. Zachary Smith: YOU do. Not I. Doesn't really mater. It doesn't seem ...
See more »

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User Reviews

Well done episode, good sets and special effects
7 May 2014 | by (Phoenix) – See all my reviews

In January 1965, the pilot episode, "No Place To Hide", was filmed, largely in the Mohave Desert. CBS network executives, as well as story editor Tony Wilson, thought that the series needed another cast member

  • - a 'troublemaker' character, who would create conflict and thus be

the catalyst for new stories.

The character of Dr. Smith was thus created to be this troublemaker. And hey, as long as we're tinkering with the cast, let's add a cool- looking robot to the crew. It's a science-fiction show, after all, and every good sci-fi series ought to have a robot, shouldn't it?

Four of the first five episodes -- The Reluctant Stowaway, Island in the Sky, There Were Giants in the Earth, The Hungry Sea -- were created by intercutting footage from the original pilot episode with newly-filmed scenes featuring Dr. Smith and the robot.

But "The Derelict" is unusual in that it was written so as to take advantage of an existing film set from "Fantastic Voyage", a major motion picture that was being filmed at Twentieth Century Fox studios in mid-1965, at the same time that Lost In Space was being filmed at the same studio.

This is one of the finest examples of the cost-conscious nature of producer Irwin Allen. Some have called him 'cheap' -- and he was -- but it was a great idea to re-use the Brain Set from "Fantastic Voyage" as the interior of the derelict spacecraft. Under-lit and seen mostly in shadow, the Brain Set made for a wonderfully creepy set for this episode, and was probably a more-expensive set than this series would normally have been able to afford.

Irwin Allen's other sci-fi show (in 1965), Voyage To The Bottom Of The Sea, made use of yet another set from "Fantastic Voyage" -- the Lung Set -- in order to simulate the interior of a giant whale that had swallowed a bathysphere containing Admiral Nelson, in the 1965 episode "Jonah And The Whale". Gotta love that Irwin Allen and his re-use of sets! He knew a bargain when he saw one!

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