A strange interdimensional ship turns Will into a genius and Dr. Smith into an old man.



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Episode complete credited cast:
Will Robinson (as Billy Mumy)


In search of precious metals, Smith, with Will in tow, discovers a compact alien space craft. The Robinson party all come to look at it, peaking Smith's interest only after the robot reports its faster than light capabilities. Will, returning later to repair the damaged robot whom Smith ordered to approach the defended alien craft, succumbs to curiosity, gets trapped aboard, and blasts off on a faster-than-light galactic journey. The round-trip flight turns him into a super genius, leaving him intellectually with little in common with his family. Smith, hoping to become a super genius as well, takes a round-trip flight of his own, but the experience leaves him a wizened old man instead. After Will blasts off on a second flight to see if the ship's effects can be reversed, the scaly alien owner appears, angrily demanding the return of his stolen property while taking Smith hostage. Written by statmanjeff

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Release Date:

20 April 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?


The Fish-Man is borrowed from Voyage To The Bottom Of The Sea TV series. Season 2 episode 24 titled "The Menfish". See more »


Near the beginning Will pulls Dr. Smith out of the cosmic dust quicksand and Smith's shirt and pants are covered with cosmic dust. The frame jumps and Smith is now knelling near the pit and his shirt and pants are perfectly clean. See more »


Dr. Zachary Smith: Agility, like youth, is wasted on children.
See more »


Oh! Susanna
Written by Stephen Foster
Sung by Dr. Smith (Jonathan Harris)
See more »

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User Reviews

Not One Of The Best
14 February 2015 | by See all my reviews

Will becomes a genius and Smith becomes an old man.

Firstly, let me point out that this episode is liked by some fans...but not by me.

This episode and The Oasis are my two least favourite episodes of season one. Both hours deal with Smith transforming into something terrible or hard to swallow (a giant or an old man) so obviously I am not too comfortable with that theme in some of LIS.

Then again, Smith would transform into something else in season two's Cave Of The Wizards and season three's Collision Of The Planets and I was not bothered by that??

Whatever the case, Change Of Space does not do it for me, but some cool alien hardware and a Voyage to the Bottom of the Sea-creature make it watchable.

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