Trying to contact his Uncle Taddeus during a séance, Doctor Smith summons a ghostly monster native to the planet.



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Episode cast overview:
Will Robinson (as Billy Mumy)


The Robinson party comes under a new threat created by Dr. Smith when he ditches an explosive in a bog full of ionized gas. The result is an invisible monster that abhors sunlight. Dr. Smith believes it's the ghost of his Uncle Thaddeus, returned from the spirit world to vent his displeasure at non-believers. Smith's efforts to placate this "spirit" puts at least one of the Robinson children in particular peril. Written by statmanjeff

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Release Date:

2 February 1966 (USA)  »

Company Credits

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Technical Specs


Sound Mix:

(RCA Sound Recording)

Aspect Ratio:

1.33 : 1
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Did You Know?


To trap the invisible creature, John and Don use the cage left behind by the Keeper. See more »


When the creature is in its invisibility state, its footprints are shown to be three-toed. However, when the creature materializes, there are more than three toes and each toe has a large claw turned and pointed downward. See more »


Maureen Robinson: You know, when I was a little girl, we found a Ouija board up in my grandmother's attic. Trouble was, nobody know how... what to do with it, even my grandmother. I'm afraid it's quite obsolete in the world of computers.
Maj. Don West: Uh, so's Dr. Smith, but then, again, I'm not sure what world he really belongs in.
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User Reviews

Creepy Stuff
13 February 2015 | by See all my reviews

Smith attempts to contact his Uncle Thaddeus in a séance...then an invisible creature appears.

The story is so confusing I am not really sure what to make of this episode?? Adding to this, Smith is a total pain during the whole hour.

But as I said in my opening LIS review, nearly every LIS episode has a good moment or two that makes the whole hour worthwhile...Ghost In Space is no exception to that rule.

That bit where Smith walks out of the Jupiter 2 and is almost killed by a flying rock is without question one of LIS's darkest moments. The wonderful B&W footage of the creature appearing and disappearing is also well done.

Ghost In Space might not make much sense to me but some creepy B&W images - always at night - make it well worth watching.

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