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The Worst Episodes of Star Trek: Discovery

Every episode of Star Trek: Discovery ranked from worst to best. Explore the Worst Episodes of Star Trek: Discovery!

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Follow the voyages of Starfleet on their missions to discover new worlds and new life forms, and one Starfleet officer who must learn that to truly understand all things alien, you must first understand yourself.

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Episode Rankings

  1. #1 Worst Episode
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    Star Trek: Discovery Season 4 Episode 4 - All Is Possible
    5.3/10(3566 votes)

    S4:E4

    Tilly and Adira lead a team of Starfleet Academy cadets on a training mission that takes a dangerous turn. Meanwhile, Burnham is pulled into tense negotiations on Ni’Var.

    Director:John Ottman
    Writers:Alan B. McElroy, Eric J. Robbins

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  2. Star Trek: Discovery Season 4 Episode 2 - Anomaly
    5.5/10(3620 votes)

    S4:E2

    Saru returns to help the U.S.S. Discovery uncover the mystery of an unusually destructive new force. As Burnham leads the crew, she must also find a way to help Book cope with an unimaginable loss.

    Director:Olatunde Osunsanmi
    Writers:Anne Cofell Saunders, Glenise Mullins

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  3. Star Trek: Discovery Season 4 Episode 6 - Stormy Weather
    5.5/10(3125 votes)

    S4:E6

    Seeking answers, the U.S.S. Discovery ventures into a subspace rift created by the Dark Matter Anomaly. Meanwhile, Book faces a strange visitor from his past.

    Director:Jonathan Frakes
    Writers:Brandon Schultz, Anne Cofell Saunders

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  4. Star Trek: Discovery Season 4 Episode 3 - Choose to Live
    5.6/10(3340 votes)

    S4:E3

    Burnham and Tilly hunt the killer of a Starfleet officer as Stamets and the science team race against the clock to prevent the anomaly from killing anyone else.

    Director:Christopher J. Byrne
    Writer:Terri Hughes

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  5. Star Trek: Discovery Season 4 Episode 11 - Rosetta
    5.6/10(2438 votes)

    S4:E11

    While Captain Burnham leads an away mission to a planet that was once home to the aliens responsible for the DMA, Book and Tarka secretly infiltrate the U.S.S. Discovery.

    Director:Jeffrey W. Byrd
    Writer:Terri Hughes

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  6. Star Trek: Discovery Season 4 Episode 8 - All In
    5.7/10(2543 votes)

    S4:E8

    Following a hunch, Captain Burnham tracks Book to an old haunt from their courier days and gets drawn into a high-stakes competition for a powerful weapon.

    Director:Christopher J. Byrne
    Writer:Sean Cochran

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  7. Star Trek: Discovery Season 5 Episode 6 - Whistlespeak
    5.7/10(1766 votes)

    S5:E6

    While undercover in a pre-warp society, Captain Burnham is forced to consider breaking the Prime Directive when a local tradition threatens Tilly's life. Meanwhile, Culber tries to connect with Stamets, and Adira steps up when Rayner assigns them a position on the bridge.

    Director:Christopher J. Byrne
    Writers:Brandon Schultz, Kenneth Lin

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  8. Star Trek: Discovery Season 3 Episode 8 - The Sanctuary
    5.8/10(4022 votes)

    S3:E8

    Osyraa attacks Book's home planet and the Discovery travels there to help. Stamets and Adira investigate The Burn.

    Director:Jonathan Frakes
    Writers:Brandon Schultz, Kenneth Lin

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  9. Star Trek: Discovery Season 5 Episode 3 - Jinaal
    5.8/10(1914 votes)

    S5:E3

    On Trill, Captain Burnham, Book, and Culber must pass a dangerous test to prove themselves worthy of the next clue. Adira reconnects with Gray and Saru’s first day as ambassador is complicated by his engagement to T'Rina.

    Director:Andi Armaganian
    Writers:Kyle Jarrow, Lauren Wilkinson

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  10. Star Trek: Discovery Season 4 Episode 1 - Kobayashi Maru
    5.9/10(4265 votes)

    S4:E1

    After months spent reconnecting the Federation with distant worlds, Captain Michael Burnham and the crew of the U.S.S. Discovery are sent to assist a damaged space station – a seemingly routine mission that reveals the existence of a terrifying new threat.

    Director:Olatunde Osunsanmi
    Writers:Alex Kurtzman, Michelle Paradise, Jenny Lumet

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  11. Star Trek: Discovery Season 4 Episode 7 - ...But to Connect
    5.9/10(2828 votes)

    S4:E7

    Tensions rise as representatives from across the galaxy gather to confront the threat of the Dark Matter Anomaly. Zora's new sentience raises difficult questions.

    Director:Lee Rose
    Writers:Terri Hughes, Carlos Cisco

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  12. Star Trek: Discovery Season 4 Episode 9 - Rubicon
    5.9/10(2368 votes)

    S4:E9

    Captain Burnham and the U.S.S. Discovery race to stop Book and Ruon Tarka from launching a rogue plan that could inadvertently endanger the galaxy.

    Director:Andi Armaganian
    Writer:Alan B. McElroy

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  13. Star Trek: Discovery Season 4 Episode 13 - Coming Home
    5.9/10(3243 votes)

    S4:E13

    The DMA approaches Earth and Ni’Var. With evacuations underway, Burnham and the team aboard the U.S.S. Discovery must find a way to communicate and connect with a species far different from their own before time runs out.

    Director:Olatunde Osunsanmi
    Writer:Michelle Paradise

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  14. Star Trek: Discovery Season 4 Episode 10 - The Galactic Barrier
    6.0/10(2438 votes)

    S4:E10

    Captain Burnham and her crew must go where few have gone before: beyond the Galactic Barrier. Meanwhile, Book learns the truth of what drives Ruon Tarka.

    Director:Deborah Kampmeier
    Writer:Anne Cofell Saunders

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  15. Star Trek: Discovery Season 4 Episode 5 - The Examples
    6.1/10(2982 votes)

    S4:E5

    Burnham and Book race to evacuate a group of stranded colonists in the anomaly’s path as one of the Federation’s brightest scientists comes aboard the U.S.S. Discovery to do high-stakes research with Saru and Stamets.

    Director:Lee Rose
    Writer:Kyle Jarrow

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  16. Star Trek: Discovery Season 5 Episode 10 - Life, Itself
    6.1/10(2219 votes)

    S5:E10

    Trapped inside a mysterious alien portal that defies familiar rules of time, space, and gravity, Captain Burnham must fight Moll – and the environment itself – in order to locate the Progenitors' technology and secure it for the Federation. Meanwhile, Book puts himself in harm's way to help Burnham survive and Rayner leads the U.S.S. Discovery in an epic winner-takes-all battle against Breen forces.

    Director:Olatunde Osunsanmi
    Writers:Michelle Paradise, Kyle Jarrow

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  17. Star Trek: Discovery Season 3 Episode 11 - Su'Kal
    6.2/10(3657 votes)

    S3:E11

    Discovery ventures to the Verubin Nebula, where Burnham, Saru, and Culber make a shocking realization about the origin of the Burn. The rest of the crew faces an unexpected threat.

    Director:Norma Bailey
    Writer:Anne Cofell Saunders

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  18. Star Trek: Discovery Season 5 Episode 1 - Red Directive
    6.3/10(2526 votes)

    S5:E1

    Captain Burnham and the U.S.S. Discovery are sent to retrieve a mysterious 800-year-old Romulan vessel; until the artifact hidden inside is stolen, leading to an epic chase. Meanwhile, Saru is offered the position of a lifetime, and Tilly's efforts to help pull her into a tangled web of secrecy.

    Director:Olatunde Osunsanmi
    Writer:Michelle Paradise

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  19. Star Trek: Discovery Season 5 Episode 7 - Erigah
    6.3/10(1534 votes)

    S5:E7

    With Moll and L'ak finally in custody, the Federation is pulled into a diplomatic and ethical firestorm when the Breen arrive and demand they be handed over. Meanwhile, a frustrated Book looks for ways to help as Tilly, Adira, and Reno work to decipher the latest clue.

    Director:Jon Dudkowski
    Writer:M. Raven Metzner

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  20. Star Trek: Discovery Season 5 Episode 8 - Labyrinths
    6.3/10(1586 votes)

    S5:E8

    When Captain Burnham is trapped within a “mindscape” designed to test her worthiness to retrieve the Progenitor's powerful technology, Book, Rayner, and the crew of the U.S.S. Discovery must hold off the Breen long enough for her to escape.

    Directors:Emmanuel Osei-Kuffour, Jr.
    Writers:Eric J. Robbins, Lauren Wilkinson

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  21. Star Trek: Discovery Season 3 Episode 4 - Forget Me Not
    6.4/10(4854 votes)

    S3:E4

    Burnham and Adira visit the Trill homeworld while Saru's efforts on the Discovery to help the crew reconnect yield surprises.

    Director:Hanelle M. Culpepper
    Writers:Anthony Maranville, Chris Silvestri, Alan B. McElroy

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  22. Star Trek: Discovery Season 3 Episode 9 - Terra Firma (1)
    6.4/10(3800 votes)

    S3:E9

    The U.S.S. Discovery crew journey to a mysterious planet in hopes of finding a cure for Georgiou's deteriorating condition. Stamets and Adira make a stunning breakthrough with the newly acquired Burn data.

    Director:Omar Madha
    Writer:Unknown

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  23. Star Trek: Discovery Season 3 Episode 10 - Terra Firma (2)
    6.4/10(3749 votes)

    S3:E10

    Georgiou uncovers the true depths of the plot against her, leading her to a revelation about how deeply her time on the U.S.S. Discovery truly changed her.

    Director:Chloe Domont
    Writer:Unknown

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  24. Star Trek: Discovery Season 5 Episode 2 - Under the Twin Moons
    6.4/10(2028 votes)

    S5:E2

    On Saru's last mission as Captain Burnham's Number One, the team ventures to a seemingly abandoned planet to hunt for what might be the greatest treasure in the galaxy.

    Director:Douglas Aarniokoski
    Writer:Alan B. McElroy

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  25. Star Trek: Discovery Season 5 Episode 5 - Mirrors
    6.4/10(1702 votes)

    S5:E5

    Captain Burnham and Book journey into extradimensional space in search of the next clue to the location of the Progenitors' power. Meanwhile, Rayner navigates his first mission in command of the U.S.S. Discovery, and Culber opens up to Tilly.

    Director:Jen McGowan
    Writers:Carlos Cisco, Johanna Lee

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Worst Episodes Summary

"All Is Possible" is the worst rated episode of "Star Trek: Discovery". It scored 5.3/10 based on 3566 votes. Directed by John Ottman and written by Alan B. McElroy, Eric J. Robbins, it aired on 12/9/2021. This episode scored 0.2 points lower than the second lowest rated, "Anomaly".