A scientist in an underwater sea lab has created a new form of plant life. His twin brother, who can control him telepathically, is on his way there via the Seaview, with plans of using the new plant creatures for his own sinister purposes.



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Episode cast overview:
John Wilson / Ben Wilson
Lt. Comdr. Chip Morton (as Bob Dowdell)
Del Monroe ...
Arch Whiting ...


The Wilson brothers have been experimenting on stimulated growth of seaweed. As the Seaview arrives to drop of supplies to an underwater research station the crew become aware the experiments have been far more successful than ever anticipated. Written by glenchapman@ruraltel.net

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Adventure | Sci-Fi




Release Date:

4 December 1966 (USA)  »

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Technical Specs


Sound Mix:

(RCA Sound Recording)


Aspect Ratio:

1.33 : 1
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User Reviews

The First Half Of This Episode Gets Ten Out Of Ten
3 August 2010 | by See all my reviews

On an underwater base, twins (both played by William Smithers) have created plant creatures, some giant and some super-giant, that soon attack the flying sub.

The first half of this episode is a wonder to the eyes, filled with all new miniature effects footage of the giant plant attacking the Flying Sub and then Seaview coming to the rescue...a situation that gets a laugh from Nelson (I love it when he laughs). What a knockout first half this is!

However, in the second half of the hour, I don't actually like seeing the man-size plants walk the corridors of Seaview as it just looks more like a Power Rangers (1993) episode, not Voyage. But the whole hour is rather pleasing thanks, in part, to guest star Williams Smithers, an actor best known for guest starring in a season two episode of classic Star Trek.

4 of 4 people found this review helpful.  Was this review helpful to you?

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