Star Trek (1973–1975)
3 user 5 critic

One of Our Planets Is Missing 

The crew of the Enterprise must stop a living planet consuming cloud before it attacks an inhabited world.



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Episode cast overview:
... Capt. Kirk (voice)
... Mr. Spock (voice)
... Dr. McCoy (voice)
... Sulu (voice)
... Uhura (voice)
... Cosmic Cloud (voice)
... Scott / Commodore Robert Wesley (voice)


A huge cosmic cloud is reported moving into the outer fringe of the galaxy. Starfleet Command sends the Enterprise to investigate. Sensors indicate it is a strange combination of Matter & Energy. It seems to engulf and feed on the energy of planets. It makes a deliberate course change to head towards the populated planet of Mantilles indicating that it could be intelligent. Kirk sees it as a threat to every planet in the galaxy and if they can't communicate with it and make it stop it will have to be destroyed. Written by tomtrekp

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Release Date:

22 September 1973 (USA)  »

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Technical Specs



| (technicolor)
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Did You Know?


This takes place in 2269. See more »


When Commodore Wesley appears on the computer monitor in Kirk's quarters, Wesley's shoulder is visible on another, separate view screen right next to him. See more »


Captain James T. Kirk: Spock, what did you... perceive?
Mr. Spock: The wonders of the universe, captain. Incredible. Completely incredible.
See more »


References One of Our Aircraft Is Missing (1942) See more »

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User Reviews

Vintage "Old" Star Trek
17 March 2017 | by See all my reviews

This is the tired old plot line that was used about six times in the original series. There is a life force out there that needs energy to survive. The Enterprise encounters a cloud that is "eating" everything in its path. Unfortunately, one of the things is a planet with millions of people on it. They will all die when the planet is consumed. The ship must negotiate the inside of the thing and avoid touching the walls. It would cause an explosion and destroy the ship. Since this cloud is sentient, what can Enterprise do to make it understand their plight? Sadly, the solution is tired and far-fetched, to say the least. I imagine some of these plots were thrown together with a deadline in sight.

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