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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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

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Release Date:

22 September 1965 (USA)  »

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Technical Specs


Sound Mix:

(RCA Sound Recording)

Aspect Ratio:

1.33 : 1
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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 »


Comets are balls of ice rather than balls of fire and intense heat. They only glow by reflected light from the nearest star. See more »


Narrator: [prologue] Last week, John Robinson, father of the first family to attempt colonization of outer space, found himself helplessly adrift when his line snapped while trying to repair navigational equipment. It is now shortly thereafter, as Maureen Robinson desperately tries to reach her husband before he drifts further off into the trackless void of outer space.
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Featured in Lost in Space: The Prisoners of Space (1966) See more »

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User Reviews

One Of The Best Scored Hours Of TV Ever
7 February 2015 | by See all my reviews

The Jupiter 2 encounters a derelict spacecraft in space.

With the exception of the Land Of The Giants pilot episode of 1968, I can't think of another hour of TV where the musical score was so totally vital to the hour. I would even go as far as saying, if you don't like the music of The will not be on the same page as this episode!

There is almost a non-stop parade of music in the whole 50 minutes, normally a TV episode has just one composer but The Derelict required three composers (Richard LaSalle, Hans J. Salter and Herman Stein) because just so much music was required.

Also good to listen to are the Dick Tufeld narrations at the beginning and end of the hour.

Jonathan Harris as Dr Smith is in top form, the effects are outstanding and The Derelict contains the crew's first close encounter with space aliens.

This is the 2001 of TV space adventure, slow but filled with wonder, music and mind-blowing images.

Ep 1: The Retuctant Stowaway and Ep 2: The Derelict together form a 100 minute space adventure that is even more pleasing than Star Wars and 2001 put together.

I can't speak highly enough about this hour.

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