Star Trek: Season 3, Episode 18

The Lights of Zetar (31 Jan. 1969)

TV Episode  |   |  Action, Adventure, Mystery
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Ratings: 6.1/10 from 795 users  
Reviews: 12 user | 3 critic

A mysterious, twinkling mass of sapient energy ravages an important archive and Scotty's new girlfriend may be linked to it.


(as Herb Kenwith)


(created by), , 1 more credit »
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Episode complete credited cast:
Jan Shutan ...
John Winston ...
Libby Erwin ...
Rest of cast listed alphabetically:
Zetar (voice)


The Enterprise is on course to install new equipment on Memory Alpha, the central library storage facility for the Federation. Chief Engineer Scott has been working closely on the project with Lieutenant Mira Romaine with whom he has been forming a romantic attachment. The Enterprise encounters a space storm that kills the staff at Memory Alpha and possesses Lieutenant Mira Romaine. Written by laird-3

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Release Date:

31 January 1969 (USA)  »

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Sound Mix:


Aspect Ratio:

1.33 : 1
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Did You Know?


"Star Trek: The Original Series" is known as a great science fiction series but many of its stories contain archetypes of horror. This is the seventh of eight stories that contain a "ghost," what author Stephen King calls an embodiment of the past imposing its will upon the present. Other ghosts (whether supernatural or metaphorical) in the series can be found in Star Trek: What Are Little Girls Made Of? (1966), Star Trek: Space Seed (1967), Star Trek: Who Mourns for Adonais? (1967), Star Trek: The Doomsday Machine (1967), Star Trek: Return to Tomorrow (1968), Star Trek: And the Children Shall Lead (1968), and Star Trek: The Savage Curtain (1969). See more »


At 48:00 (for 10 seconds) Kirk, McCoy and Spock are speaking - through the doorway behind McCoy, you can see a discarded newspaper lying on the floor that one of the (TV) crew members apparently left on the set. It is still there at 48:58 for another 25 seconds or so. See more »


Dr. McCoy: A comparison of our Steinman with Starfleet records shows that Lt. Romaine's fingerprints, voice analysis, all external factors remain exactly the same as before; however, according to two hyperencephalograms, her brainwave pattern has been altered.
Capt. Kirk: But that's impossible.
Dr. McCoy: That's what I was taught.
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User Reviews

Scotty in Love!
10 May 2014 | by (United States) – See all my reviews

This is a vehicle to expand the humanity of the crew. Scotty, who is always seen as cool and married to the Enterprise, is, like most of the crew, uninvolved. Kirk is always on the make, but the rest, from McCoy on down, don't seem to have any social life. Each, including Spock, has had his or her heartstrings pulled at times, but it is always unrequited. Here Scotty is taken with Mira, who is on her first mission. I don't know where new crew members come from. So many redshirts and other throwaways seem to meet their demises. Anyway, the ship is like a small town and it would seem everyone would know everyone else. All that aside, Mira has Scotty's attention and it seems to be mutual. Enter the alien of the week, a collection of bright lights (quite beautiful, actually) which have the ability to suck the life out of anyone they declare as a host. Mira, unfortunately, absorbs this creature. Her personality changes and she begins to have visions. The Starship crew is faced with the task of getting this thing out of her as well as freeing the Enterprise from its influence. One can see on Spock's face that the Prime Directive dealing with sentient beings is coming into play, since the alien can communicate with them. Ultimately, it depends on Scotty. This is a decent entry.

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