Spoiler warning: Plot and/or ending details follow.

"Si Vis Pacem, Para Bellum" is the eighth episode of Star Trek: Discovery in the program's first season, which premiered on 5 November 2017 exclusively on CBS All Access.


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Log entries Edit

  • Personal log, Specialist Michael Burnham, Stardate 1308.9. 
    We landed on Pahvo eighteen hours ago. It's a seemingly uninhabited planet, but a unique and, for us, strategic one. Every tree, rock, and blade of grass here vibrates with its own specific tone. Together these combine to form a kind of music, the signature sound of the planet heard everywhere on the surface. The sound is even broadcast into space by a towering crystal structure, a sort of naturally-occurring transmitter. It is Starfleet's plan to modify the electromagnetic frequency of Pahvo's signal and harness it as a form of SONAR that can detect the presence of cloaked Klingon vessels decimating our fleet, make them visible to our sensors, and turn the tide of war in our favor.



AiriamR. A. BryceMichael BurnhamKatrina CornwellHugh CulberKeyla DetmerGrafkKolT'Shen KovilGabriel Lorca (mirror)L'RellJoann OwosekunGen RhysSaruSilrekPaul StametsTerralSylvia TillyTorathAsh Tyler (Klingon)unnamed KlingonsPahvans



Races and culturesEdit


Other referencesEdit

apex predatorradio silence


The Klingons and Starfleet continue warring.



  • The eighth episode of Discovery, this episode was made available on CBS All Access streaming service for subscribers only on 5 November 2017.

Notable cast and crewEdit



Star Trek: Discovery episodes
season 1 chapter 1 "The Vulcan Hello" • "Battle at the Binary Stars" • "Context Is For Kings" • "The Butcher's Knife Cares Not for the Lamb's Cry" • "Choose Your Pain" • "Lethe" • "Magic to Make the Sanest Man Go Mad" • "Si Vis Pacem, Para Bellum" • "Into the Forest I Go"
chapter 2 "Despite Yourself" • "The Wolf Inside" • "Vaulting Ambition" • "What's Past Is Prologue" • "The War Without, The War Within" • "Will You Take My Hand?"
season 2 "Brother" • "New Eden" • "Point of Light" • "An Obol for Charon" • "Saints of Imperfection" • "The Sounds of Thunder" • "Light and Shadows" • "If Memory Serves" • "Project Daedalus" • "The Red Angel" • "Perpetual Infinity" • "Through the Valley of Shadows" • "Such Sweet Sorrow"


published order
Previous episode:
Magic to Make the Sanest Man Go Mad
Discovery episode produced Next episode:
Into the Forest I Go
Previous episode:
Magic to Make the Sanest Man Go Mad
Discovery episode aired Next episode:
Into the Forest I Go
chronological order
Previous Adventure:
Magic to Make the Sanest Man Go Mad
Voyages of the
USS Discovery
Next Adventure:
Into the Forest I Go

External linksEdit

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