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The USS Discovery crew is intrigued by new addition, Lt. Ash Tyler. Sarek seeks Burnham's help, rekindling memories from her past. Admiral Cornwell questions Lorca's tactics.


Gene Roddenberry (based upon "Star Trek" created by), Bryan Fuller (created by) | 7 more credits »

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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
Wilson Cruz ... Dr. Hugh Culber
James Frain ... Sarek
Mia Kirshner ... Amanda Grayson
Kenneth Mitchell ... Kol
Conrad Coates ... Terral
Emily Coutts ... Keyla Detmer
Julianne Grossman ... Discovery Computer (voice)
Luke Humphrey ... V'Latak


The USS Discovery crew is intrigued by new addition, Lt. Ash Tyler. Sarek seeks Burnham's help, rekindling memories from her past. Admiral Cornwell questions Lorca's tactics.

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TV-14 | See all certifications »


Official Sites:

Official Site




English | Klingon

Release Date:

22 October 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 »

Did You Know?


After Sarek in Star Trek: Discovery: The Vulcan Hello (2017) and Harcourt Fenton Mudd in Star Trek: Discovery: Choose Your Pain (2017), Amanda Grayson is the third character introduced in Star Trek (1966) to appear in Star Trek: Discovery (2017). See more »


In the beginning you see Sarek preparing to leave Vulcan. In the background you can see two large moons in the sky despite the fact that Spock has said that Vulcan has no moons in the original series. See more »


Michael Burnham: What do you recall of your rescue? Of what transpired between us?
Sarek: I was unconscious, was I not?
Michael Burnham: You know what happened. You could talk to me about it. Help me understand what you did. It could make us grow closer, not further apart. That's what families do.
Sarek: Technically, we are not related.
Michael Burnham: You can do better. But I won't push you. We'll have this conversation one day - Father.
See more »


Featured in Star Trek: Discovery: Perpetual Infinity (2019) See more »

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User Reviews

"Space so Vast, Planets so Cold"
1 November 2017 | by XweAponXSee all my reviews

This episode's title reminds me of a character from "Dagger of the Mind", played by Susan Wasson: "Lethe" - a word that means either the name of a river in Hell, that drinking from can cause you to forget everything, or it simply means "oblivion" or "forgetfulness".

In that TOS episode, Dr Tristan Adams (Played by James Gregory of the appropriate film "The Mancurian Candidate") says this while the blank expression of the woman "Lethe" stares at us from the background:

(A Toast) - "To all mankind, may we never find space so vast, planets so cold, hearts and mind so empty that... that we cannot fill them with love and warmth."

And this exemplifies Sarek's current condition. He is in an empty place, a Lethe place. His ship was damaged by an attack from a "Vulcans Only" terrorist group, the same group that tried to kill Michael when she was a young girl, when Sarek used the Mind Meld to share his Katra with her and bring her back.

A mind meld that works both ways, now his Katra is calling for Michael.

This episode was very difficult for me to watch. From within Sarek and Michael's Meld, there is a rich history of things that happened, some of which we know about, regarding why Sarek, in TOS, had a strained relationship with his own son. We already knew that Sarek wanted Spock to serve in a more Vulcan way. In TOS, Spock did not attend the Vulcan Science Academy. But here, it is the Vulcan Expeditionary Force. Details are not important, the reasons why are.

So we see here that it was Sarek's intent that both Michael and Spock be involved with Vulcan endeavors. But the Vulcans gave him a choice, and the results of that choice directly relate to the original story of Spock and Sarek.

Masterfully done, and it was done from within a rescue mission for Sarek, while he is drifting away both literally and figuratively in the "Yridian Nebula" (Another reference to "Yuri", there were many references to "Kei and Yuri" in Next Generation, care of artist and designer Rick Sternbach).

Meanwhile, it's revealed here and Lorca has some real issues, he carries a Phaser while having sex with Admiral Cornwell (Jayne Brook, who I did not recognize from "Kindergarten Cop"). She wants to do something about it, but is sidetracked by having to resume Sarek's mission in his stead. And now, she is in a Lethe place. The question is, what's Lorca going to do about it?

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