Spoiler warning: Plot and/or ending details follow.

"Battle at the Binary Stars" is the second episode of Star Trek: Discovery in the program's first season, which premiered on 24 September 2017 exclusively on CBS All Access.



Brett AndersonMichael BurnhamDanby ConnorDennasKeyla DetmerKamran GantPhilippa GeorgiouTroy JanuzziKolL'RellSarekSaruT'KuvmaUjilliVoqBritch Weeton
Referenced only 
Kahless the Unforgettable

Starships and vehiclesEdit

USS ClarkeUSS DanaUSS EarhartUSS EdisonUSS EuropaUSS KeralaUSS RideUSS ShranUSS Shenzhou (Walker-class) • USS SiouxUSS T'Plana-HathUSS Yeager


Referenced only 
Donatu VQo'noS

Races and culturesEdit

Referenced only 

States and organizationsEdit

Klingon EmpireStarfleetUnited Federation of PlanetsVulcan Science Academy

Science and technologyEdit

binary starcontainment fieldlateral vector transporterphase cannonphoton torpedospace

Ranks and titlesEdit

admiralcaptaincommanderensignfirst officerlieutenant commanderoperations officerscience officer

Other referencesEdit

2249Battle of the Binary Starsbrigbulkheadmutiny


May 2256 
The Klingons and Starfleet begin a disastrous encounter at the binary stars. (DSC episode: "The Vulcan Hello")



  • The second episode of Discovery, this episode was also the first Star Trek episode which was not broadcast (in the USA) in any manner, it was made available on CBS All Access streaming service for subscribers only on 24 September 2017, the same date as the pilot episode's traditional broadcast premiere. In Canada, this episode was broadcast on SPACE immediately following "The Vulcan Hello".


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?"


published order
Previous episode:
The Vulcan Hello
Discovery episode produced Next episode:
Context Is For Kings
Previous episode:
The Vulcan Hello
Discovery episode aired Next episode:
Context Is For Kings
chronological order
Previous Adventure:
The Vulcan Hello
Voyages of the
USS Discovery
Next Adventure:
Context Is For Kings

External linksEdit