23 user 16 critic

The Sound of Thunder 

When a new signal appears over Saru's home planet, Burnham, Saru and the crew embark on a perilous mission that puts Saru in danger and raises questions about the Red Angel's intentions. ... See full summary »


Gene Roddenberry (based upon "Star Trek" created by), Bryan Fuller (created by) | 5 more credits »




Episode cast overview, first billed only:
Sonequa Martin-Green ... Michael Burnham
Doug Jones ... Saru
Anthony Rapp ... Paul Stamets
Mary Wiseman ... Sylvia Tilly
Shazad Latif ... Ash Tyler
Wilson Cruz ... Dr. Hugh Culber
Anson Mount ... Captain Christopher Pike
Javier Botet ... Ba'ul
Hannah Cheesman ... Lt. Cmdr. Airiam
Emily Coutts ... Lt. Keyla Detmer
Patrick Kwok-Choon ... Lt. Gen Rhys
Oyin Oladejo ... Lt. Joann Owosekun
Ronnie Rowe ... Lt. R.A. Bryce (as Ronnie Rowe Jr.)
Hannah Spear ... Siranna
Julianne Grossman ... Discovery Computer (voice)


When a new signal appears over Saru's home planet, Burnham, Saru and the crew embark on a perilous mission that puts Saru in danger and raises questions about the Red Angel's intentions. Hugh struggles to come to terms with his new reality.

Plot Summary | Add Synopsis


TV-PG | See all certifications »






Release Date:

21 February 2019 (USA) See more »

Company Credits

Show more on IMDbPro »

Technical Specs


Sound Mix:

Dolby Digital (5.1)



Aspect Ratio:

2.35 : 1
See full technical specs »

Did You Know?


Conspicuously, neither of the two species living on Kaminar are called "Kaminari." This is an inside joke for people who speak Japanese as "kaminari" is Japanese for "thunder." See more »


Despite the Kelpiens being very sensitive and fearful, Siranna's threat ganglias don't seem to activate at some points where they most certainly would have to, especially when Michael appears to her (she never saw anything other than Kelpiens), and when she is in the Ba'ul structure, including when the Ba'ul and the drones are threatening them and Siranna looks terrified. See more »


Sylvia Tilly: You think the Ba'ul are hiding something?
Michael Burnham: I think they know more about the changes brought on by Vahar'ai than the Kelpiens do, and I think they're willing to do almost anything to keep that secret.
Sylvia Tilly: Will they kill Saru?
Michael Burnham: Not if we can find out what they're hiding in time. And there has to be something in the Sphere's archive. There has to be.
Sylvia Tilly: Well, that's what... Airiam and I are here for. We will find it.
Lt. Cmdr. Airiam: [studying the ship's monitors] There it is.
Sylvia Tilly: When I said "we", I just meant Airiam.
See more »


Features Star Trek: Short Treks: The Brightest Star (2018) See more »

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User Reviews

Saru's Revenge
22 February 2019 | by XweAponXSee all my reviews

The magic Red Angel lures Discovery to Saru's home planet- and then vanishes...

Leaving Saru to deal with his "race of technologically superior oppressors", the 2nd race that lives on his home planet (Kaminar). Who we were led to believe ate the Kelpians who were "culled".

Turns out, that wasn't quite what was happening. Oh, the culled Kelpians vanished, all right. But not into the stomachs of any of Saru's neighbors.

It was an excuse. Because as afraid as Saru has been all of his life, there are others who are even more frightened.

This is Doug Jone's hour- years of playing monsters and angels in Guillermo del Toro films like Hellboy and Pans Labyrinth, usually as several characters at once, has prepared him to BE Saru. And Saru, to me, has evolved to become one of those Star Trek characters, like Spock, Data and Worf, that this show is all about. In The Original Series, we learned about Vulcans. In The Next Generation, it was Androids and Klingons. In Deep Space Nine, it was Ferengi, Changelings, Jem'Hadar, Cardassians, and Bajorans. And in Voyager, we got an in depth look at The Borg and their Queen(s), along with their nemesis' "Species '857-6309'", who could look like Mr Boothby (Ray Walston). Oh yes, and Voyager brought us more about Q as well.

And then there was Enterprise, how about a little Xindi? A species of aquatics, bugs, reptiles, sloths, humanoids, and an extinct airborne version- All with the same DNA even.

So now it's Saru's turn, turns out there is this huge story centering on him and his planet and the two life forms that live there. And this is it. Of course, let's just dispose of the prime directive... But it would appear that what happens in this episode was gonna happen come hell or High Red Angels, with or without any help from Discovery or The Federation.

Meanwhile, In case "Hugh" missed it, Dr Culber's back. 'xcept he doesn't quite know what to do with himself.

So this makes 3 "Red Angel" Disasters that have been averted, and where disasters are averted, miracles abound. Like Tilly's Magic Rock, saving May's species, and now this.

This is Star Trek: just because the miracles were due to tech, does not make them any less miracles.

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