26 user 32 critic

Si Vis Pacem, Para Bellum 

The U.S.S. Discovery is tasked with a high priority mission to the planet Pahvo and learn the science behind the Klingons' cloaking technology.


John Scott (as John S. Scott)


Gene Roddenberry (based upon "Star Trek" created by), Bryan Fuller (created by) | 6 more credits »




Episode cast overview, first billed only:
Sonequa Martin-Green ... Michael Burnham
Doug Jones ... Saru
Shazad Latif ... Ash Tyler
Anthony Rapp ... Paul Stamets
Mary Wiseman ... Sylvia Tilly
Jason Isaacs ... Captain Gabriel Lorca
Jayne Brook ... Admiral Cornwell
Mary Chieffo ... L'Rell
Wilson Cruz ... Dr. Hugh Culber
Kenneth Mitchell ... Kol
Michael Boisvert ... Kovil
Conrad Coates ... Admiral Terral
Emily Coutts ... Keyla Detmer
Anthony Grant ... Klingon Communications Officer
Julianne Grossman ... Discovery Computer (voice)


The U.S.S. Discovery is tasked with a high priority mission to the planet Pahvo and learn the science behind the Klingons' cloaking technology.

Plot Summary | Add Synopsis


TV-MA | See all certifications »

Did You Know?


When Saru wakes up to speak with the Pahvans, the original transporter sound effect from Star Trek: The Original Series: The Cage (1986) is utilised. See more »


Admiral Cornwell says the Federation has no death penalty. There was at this time one capital offense: violation the quarantine of planet Talos IV. See more »


Ash Tyler: It's two days until pickup. We're making great time.
Saru: Perhaps it's a great time for you Humans. I, of course, could make it there in 15 minutes.
Ash Tyler: Didn't know you were such a sprinter, Mr. Saru.
Michael Burnham: Kelpiens pursued by apex predators have exceeded speeds of 80 kilometers per hour. They can also sense predators, from a distance of as much as ten kilometers.
Saru: Yeah, and we particularly enjoy being discussed in the third person while present.
See more »


Featured in After Trek: Magic to Make the Sanest Man Go Mad (2017) See more »

User Reviews

Decent episode more in the spirit of the original shows
15 January 2021 | by snoozejoncSee all my reviews

Discovery heads to the planet Pahvo in an attempt to counter the Klingon cloaking system.

I enjoyed this for being close to the original series mission statement as it attempts to seek out new life and a new civilisation. Unfortunately it's all in the name of the war effort. It also has some reasonably solid character development.

The plot aligns well with the episodes themes regarding war being the only path to peace in certain instances. It was refreshing to see an away mission in a peaceful location and this contrasted well with the scenes depicting the Klingon sub-plot. Some of the dialogue again was a bit too exposition heavy for my liking and the technobabble felt quite awkwardly written.

Performances were solid, particularly Doug Jones as Saru who was in heavy focus.

It does a good job of setting up what feels like major conflict in the next episode.

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Official Sites:

Official Site




English | Klingon

Release Date:

5 November 2017 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:

Dolby Digital (5.1)



Aspect Ratio:

2.00 : 1
See full technical specs »

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