Star Trek: Voyager (1995–2001)
10 user 4 critic

Scientific Method 

A string of bizarre illnesses afflicts the Voyager crew. The Doctor and Seven of Nine uncover a team of alien researchers existing out of phase performing medical experiments on the ship's crew.


David Livingston


Gene Roddenberry (based upon "Star Trek" created by), Rick Berman (created by) | 5 more credits »




Episode cast overview:
Kate Mulgrew ... Capt. Kathryn Janeway
Robert Beltran ... Cmdr. Chakotay
Roxann Dawson ... Lt. B'Elanna Torres
Robert Duncan McNeill ... Lt. Tom Paris
Ethan Phillips ... Neelix
Robert Picardo ... The Doctor
Tim Russ ... Lt. Tuvok
Jeri Ryan ... Seven of Nine
Garrett Wang ... Ensign Harry Kim
Rosemary Forsyth ... Alzen
Annette Helde ... Takar


After Voyager investigates a binary pulsar system (and while B'Elanna's and Tom's clandestine trysts become the talk of the ship), severe genetic ailments begin dropping the crew, with Capt. Janeway herself suffering insomnia and worsening headaches. Recent proximity to the pulsars raises suspicions, but when B'Elanna and the Doctor simultaneously come under attack as they near the truth, the Doctor realizes Voyager has been invaded by unseen aliens with designs on the crew and covertly elicits Seven of Nine's help to expose them. Written by statmanjeff

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TV-PG | See all certifications »

Did You Know?


This takes place in 2374. See more »


As soon as he is "healed," Chakotay's hair grows back to it's same length and gray distribution as it was prior to his illness. See more »


Alzen: We WILL be continuing our research. If you make no further attempts to interfere, I assure you that the fatality rate will be minimal, though there may be some deformities. And, I would be willing to share our final data with you.
Captain Janeway: You can't possibly expect me to accept that.
Alzen: If you don't, then the entire experiment and its subjects will be terminated.
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Featured in The Toys That Made Us: Star Trek (2018) See more »


Star Trek: Voyager - Main Title
Written by Jerry Goldsmith
Performed by Jay Chattaway
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User Reviews

Self-Centered Aliens
30 August 2018 | by HitchcocSee all my reviews

I would have given this a 10 were it not for the tiresome romance of Paris and Torres. They are eating up too much of the time. Put that aside and we have an excellent episode. Some aliens who are out of phase are injecting something into the the DNA of crew members. These several markers are doing different things to the crew. They are becoming ill, aging, dying. The Captain is in a horrible mood and is taking no prisoners. One thing, the appearance of Seven has really uplifted the series. She works in tandem with the Doc here as they try to see into what the alien presence is doing. Next to the Borg. These entities are about as bad as creatures can be.

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Official Sites:

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Greek | English

Release Date:

29 October 1997 (USA) See more »

Company Credits

Production Co:

Paramount Television See more »
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Technical Specs


Sound Mix:

Dolby | Stereo



Aspect Ratio:

1.33 : 1
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