Real World article
(written from a Production point of view)
MA 2009Warning!
This page contains information regarding I AM ERROR, and thus may contain spoilers.

Back on the USS Discovery, Michael Burnham and the crew are faced with the harsh reality of the war during their absence. In order to move forward, Starfleet must use unconventional tactics and sources to take their next action against the Klingons.


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Act One

Act Two

Act Three

Act Four

Memorable quotes

Log entries

Background information

Production history


  • Admiral Cornwell, in her speech to the Discovery's crew, told them their visit would be the first time in nearly one hundred years, since Captain Jonathan Archer and the Enterprise first visited Qo'noS in 2151, as shown in ENT: "Broken Bow".
  • It is revealed that the ISS Discovery was destroyed by Klingons after crossing into the prime universe, trading places with its counterpart. Starfleet has found the debris and presumed it was the USS Discovery.
  • Starbase 1 is revealed to be only a hundred au from Earth and now under Klingon control. Three starships were lost and several senior Starfleet officers were killed when they took the starbase.
  • It's revealed that the ISS Discovery was destroyed by the Klingons not long after arriving in the prime universe. Thus Starfleet thought it was its prime universe counterpart that was destroyed with all hands.
  • The Federation Council allows the mirror Emperor Philippa Georgiou to assume the identity of her prime universe counterpart to lead a strike against the Klingon homeworld to end the war.
  • The Klingon homeworld Qo'nos is revealed to be a series of caves, one even large enough to hold a Crossfield-class starship like the USS Discovery. In the mirror universe, Qo'nos is a blackened ruin.
  • It was stated that in the mirror universe the Terran Empire controls more territory than the Federation and has explored further than they have dared.
  • Starfleet highly classifies all information on the Discovery's visit to the mirror universe. This could explain how the mirror Jonathan Archer could find no information on the Terran Empire in the USS Defiant's 2268 database, meaning the Halkan incident was also so classified by Starfleet, though at some point it was declassified as Bashir told Kira he read about Kirk's crossover at Starfleet Academy.

Links and references



Special guest star

Guest starring


Uncredited co-stars

Stunt doubles and stand-ins



agri-transport; Archer, Jonathan; au; Battle of the Binary Stars; cancer; choH'a'; class 4 moon; cloaking device; Delta 2; Discovery, ISS; EM dart; Enterprise NX-01; House of D'Ghor; House of Mo'Kai; hypothermic charge; Iridin; Kelfour VI; Klingon raider; Lorca, Gabriel; Lorca, Gabriel; mitochondria; mycelial bloom; mycelial network; Nivalla; Qo'noS; Saratoga, USS; Septra; species reassignment protocol; spore harvest; Starbase 1; Starbase 12; Starbase 19; Starbase 22; terraforming; Veda system

Star chart references

11 Leonis Minoris; 59 Eridani; Acamar; Adelphous; Ajilon; Aldebaran; Alpha Monocerotis; Alpha Onias; Alpha Quadrant; Amar; Andoria; Archanis; Archer; Ardana; Azure Nebula; B'Moth; Ba'ku; Balduk; Barolia; Beta XII-A; Beta Lankal; Beta Leonis Minoris; Beta Quadrant; Beta Pictoris; Beta Rigel; Beta Thoridar; Brestant; Briar Patch; Carraya; Castor; Chi Leonis; Coridan; D'deridex; Deep Space K-7; Delta Outpost 3; Delta Outpost 4; Delta Outpost 5; Delta Outpost 6; Delta Outpost 7; Delta Outpost 8; Delta Outpost 9; Delta Outpost 10; Delta Outpost 11; Deneva; Dewa; Dinasia; Draken; Elas; Elora; Epsilon IV; Epsilon Hydrae; Epsilon Outpost; Epsilon Outpost 1; Epsilon Outpost 2; Epsilon Outpost 3; Epsilon Outpost 4; Epsilon Outpost 5; Epsilon Outpost 6; Epsilon Outpost 7; Epsilon Outpost 8; Epsilon Outpost 9; Epsilon Outpost 10; Epsilon Outpost 11; Galorndon Core; Gamma 400 system; Gamma Eridon; Gamma Hromi; Ganalda; Gariman sector; Gasko; Gorath; H'atoria; Halee; Hromi Cluster; Hyralan; Iconia; Iconians; Iccobar; Ikalia; Japori; Jouret; K't'inga; Khitomer; Klach D'kel Brakt; Krios; Korvat; Lambda Geminorum; Mempa; Mempa sector; Miridian; Morska; Narendra; Nequencia; New Providence; No'Mat; Omega Leonis; Organia; Orion; Paulson Nebula; Pheben; Pollux; Praxis; Qo'noS; Qo'noS sector; Qu'Vat; Ramatis; Regulus; Risa; Rura Penthe; Sherman's Planet; Sol; Son'a; Starbase 23; Starbase 24, Starbase 234; Starbase 343; Tarlac; Tananda Bay; Tellun; Tomed; Tranome Sar; Troyius; Ty'Gokor; Unroth; Valt; Vulcan; Xarantine; Yridia

Qo'noS globe locations

Caves of Kahless; Caves of No'Mat; Central Plains Area; First City; Hamar Mountains; Kang's Summit; Ketha Province; L'chorta; Lake of Lusor; Lyn'Knor Tak; Mekro'vak region; N'vok Tor; O'ror Tuluoc; Pen'la Took; Qo'noS Pop Center; Qo'nVas Tem; Skral River; Tar' Kl'val; V'hechess; Vi'chak; Vort Kling Tuuk

Delta 2 locations

Apollodorus; Barma; Calvino; Enwonwu Mountain Range; Holbein; Hun Kal; Rameau

External links

Previous episode:
"What's Past Is Prologue"
Star Trek: Discovery
Season 1
Next episode:
"Will You Take My Hand?"
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