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


Herbert Kenwith (as Herb Kenwith)


Gene Roddenberry (created by), Jeremy Tarcher | 2 more credits »





Episode complete credited cast:
William Shatner ... Capt. Kirk
Leonard Nimoy ... Mr. Spock
DeForest Kelley ... Dr. McCoy
Jan Shutan ... Lt. Mira Romaine
James Doohan ... Scott
George Takei ... Sulu
Walter Koenig ... Chekov
Nichelle Nichols ... Uhura
Majel Barrett ... Nurse Chapel
John Winston John Winston ... Lt. Kyle
Libby Erwin Libby Erwin ... Technician
Rest of cast listed alphabetically:
Barbara Babcock ... 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

Plot Summary | Add Synopsis


TV-PG | See all certifications »

Did You Know?


Shari Lewis decided to write the romantic angle centering on Scotty as a way to break away from the formula of Kirk always getting the love interests. See more »


After the first lights attack, a close up shot of Sulu is reversed: notice his hair is parted the wrong way. 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.
See more »

Alternate Versions

Special Enhanced version Digitally Remastered with new exterior shots and remade opening theme song See more »


Featured in Nostalgia Critic: Star Trek V: The Final Frontier (2012) See more »


Music credited to Alexander Courage, although it strongly resembles the main title music for 'Hollow Triumph (1948)' by Sol Kaplan
Sung by Loulie Jean Norman
See more »

User Reviews

17 March 2013 | by aimless-46See all my reviews

Not a great episode overall but worth watching for the fun the writers are permitted to have with Spock. He gets to overplay his Vulcan side in scene after scene; alienating every crewman he victimizes. It might be that by this point they sensed the series would be toast in a couple months and played this stuff for laughs. Nimoy is obviously having a lot of fun with this script as well, as the overbearing Vulcan repeatedly inserts decimals into his pronouncements and criticizes everyone for not being sufficiently precise.

Also of note is the cold sore (?) that appears and reappears on the lower lip of the guest star (Scotty's love interest). Apparently this began in mid-production as the first scenes shot do not feature it.

They again, what do I know? I'm only a child.

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Release Date:

31 January 1969 (USA) See more »

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Sound Mix:

Mono | DTS (re-mastered version)| Dolby Digital (re-mastered version)


Color | Color (Technicolor)

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