Star Trek: Season 1, Episode 27

The Alternative Factor (30 Mar. 1967)

TV Episode  -   -  Action | Adventure | Sci-Fi
Your rating:
    1 2 3 4 5 6 7 8 9 10 -/10 X  
Ratings: 5.9/10 from 892 users  
Reviews: 19 user | 9 critic

While investigating and scanning an uncharted planet, the Enterprise and its quadrant of space are subjected to a violent force that seems to cause a 'blinking out' of everything near them.... See full summary »



, (created by)
0Check in

User Lists

Related lists from IMDb users

a list of 6602 titles
created 01 Jan 2012
a list of 4644 titles
created 08 Jan 2012
a list of 25 titles
created 19 Mar 2013
a list of 44 titles
created 03 Jun 2013
a list of 679 titles
created 9 months ago

Related Items

Connect with IMDb

Share this Rating

Title: The Alternative Factor (30 Mar 1967)

The Alternative Factor (30 Mar 1967) on IMDb 5.9/10

Want to share IMDb's rating on your own site? Use the HTML below.

Take The Quiz!

Test your knowledge of Star Trek.
« Previous Episode | 28 of 80 Episodes | Next Episode »





Episode complete credited cast:
Janet MacLachlan ...
Charlene Masters
Richard Derr ...
Commodore Barstow
Arch Whiting ...
Assistant Engineer
Christian Patrick ...
Transporter Chief
Eddie Paskey ...


While investigating and scanning an uncharted planet, the Enterprise and its quadrant of space are subjected to a violent force that seems to cause a 'blinking out' of everything near them. When the scanners resume, where once there was no life on the planet, now there is one life sign. Kirk, Spock and a security force beam down to investigate and find a man named Lazarus who collapses and is brought aboard the Enterprise for treatment. To complicate things further, the initial phenomenon almost totally drained their dilithium crystals. Starfleet and Kirk suspect this phenomenon could be a prelude to invasion. While interrogating Lazarus he tells Kirk that he's locked in a struggle with another being who is 'anti life' and is behind the phenomenon. The disruptions continue to occur and the ship's situation grows worse. Written by tomtrekp

Plot Summary | Plot Synopsis


See all certifications »


Official Sites:



Release Date:

30 March 1967 (USA)  »

Company Credits

Show detailed on  »

Technical Specs


Sound Mix:


Aspect Ratio:

1.33 : 1
See  »

Did You Know?


The glass dome on Lazarus' ship later turns up over the abode of the Providers in Star Trek: The Gamesters of Triskelion (1968). See more »


When the fire starts in engineering, and the assistant engineer drags Masters out of the room, when they are almost to the door the smoke in the room is still relatively light, and there is not enough of it to obscure vision, but less than 3 seconds later when the door to the corridor opens, the smoke is so thick that it is not possible to see through it, a solid wall of smoke. See more »


Dr. McCoy: He's in a lot of pain!
Capt. Kirk: Sometimes pain can drive a man harder than pleasure. I'm sure you know that, Doctor!
See more »


Referenced in Weird Science: Magnifico Dad (1994) See more »

Frequently Asked Questions

This FAQ is empty. Add the first question.

User Reviews

Weird Goatee Beard Changes - Thicker Then Thinner
26 February 2007 | by (London) – See all my reviews

I love these old STAR TREK episodes but this must be one of the lamest ever. I couldn't figure out what on earth was going on - nor could Kirk and Spock by the sound of them. Spock keeps making strange and frankly incomprehensible statements like "it's possible...very possible." It's either possible or not, make up your mind, Mr Spock.

Meanwhile, a man falls off a cliff, again and again, and is cured by a small plaster, though blood drips from his mouth. The best parts are Kirk's line "I want facts, not poetry!" and the Enterprise crew hanging out in the recreation room smirking at the state of the canteen coffee while the goatee man prowls about looking ragged. Couldn't Bones have loaned him a spare suit at least?

It's still all splendid fun, of course, and I recommend it wholeheartedly over all modern TV programmes.

18 of 22 people found this review helpful.  Was this review helpful to you?

Message Boards

Recent Posts
Question about Shore Leave soulaco2
Was it a Mistake..? waddah-j
Name The Things... powersroc
Guest Stars who should have been CAST MEMBERS of Star Trek.............. BLACKsoapFan
What would you have liked to see in Season 4? newdickmorris
The worst STAR TREK episode david-h-downing
Discuss The Alternative Factor (1967) on the IMDb message boards »

Contribute to This Page

Create a character page for: