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"The Sanctuary" is the 37th episode of Star Trek: Discovery, the 8th episode of the show's 3rd season, released on CBS All Access on 3 December 2020.


Burnham and the USS Discovery crew travel to Book’s home planet to help rescue it from Osyraa, the formidable leader of the Emerald Chain. Meanwhile, Stamets and Adira continue their search for valuable information on the origin of the Burn.


This article is a stub relating to a canon episode. You can help our database by expanding on it.



Cleveland BookerR.A. BryceMichael BurnhamHugh CulberKeyla DetmerPhilippa GeorgiouGrudgeHajKyheemLetoLinusNilssonOsyraaJoann OwosekunTracy PollardGen RhysRynSaruPaul StametsAdira TalGray TalSylvia TillyTolorCharles Vance
Referenced only 

Starships and vehicles

USS Discovery (Crossfield-class research vessel) • ViridianBooker's shipEisenberg-class
Referenced only 
USS Tikhov

Races and cultures

Referenced only 


Federation HeadquartersKwejian (planet)

States and organizations

Emerald Chain

Other references

The Burnelectromagnetic gelhecapateKwejian whiskeyPrime Directivetrance worm



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 Sound of Thunder" • "Light and Shadows" • "If Memory Serves" • "Project Daedalus" • "The Red Angel" • "Perpetual Infinity" • "Through the Valley of Shadows" • "Such Sweet Sorrow"
season 3 "That Hope Is You, Part 1" • "Far From Home" • "People of Earth" • "Forget Me Not" • "Die Trying" • "Scavengers" • "Unification III" • "The Sanctuary" • "Terra Firma" • "Su'Kal" • "There Is A Tide..." • "That Hope Is You, Part 2"
season 4 "Kobayashi Maru" • "Anomaly" • "Choose to Live" • "All Is Possible" • "The Examples" • "Stormy Weather" • "...But to Connect" • "All In" • "Rubicon" • "The Galactic Barrier" • "Rosetta" • "Species Ten-C" • "Coming Home"


published order
Previous episode:
Unification III
Discovery episode produced Next episode:
Terra Firma
Previous episode:
Unification III
Discovery episode aired Next episode:
Terra Firma
chronological order
Previous Adventure:
Unification III
Voyages of the
USS Discovery
Next Adventure:
Terra Firma

External link