The WORST episodes of Star Trek: Discovery

Every episode of Star Trek: Discovery ever, ranked from worst to best by thousands of votes from fans of the show. The worst episodes of Star Trek: Discovery!

Ten years before Kirk, Spock, and the Enterprise, the USS Discovery discovers new worlds and lifeforms as one Starfleet officer learns to understand all things alien.

Last Updated: 11/27/2025Network: Paramount+Status: Ended
All Is Possible
star
7.01
2159 votes

#1 - All Is Possible

Season 4 - Episode 4 - Aired 12/9/2021

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

Directors: John Ottman
Jinaal
star
7.08
1355 votes

#2 - Jinaal

Season 5 - Episode 3 - Aired 4/11/2024

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.

Directors: Andi Armaganian
Whistlespeak
star
7.14
1265 votes

#3 - Whistlespeak

Season 5 - Episode 6 - Aired 5/2/2024

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.

Stormy Weather
star
7.15
2110 votes

#4 - Stormy Weather

Season 4 - Episode 6 - Aired 12/23/2021

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.

Directors: Jonathan Frakes
Choose to Live
star
7.19
2201 votes

#5 - Choose to Live

Season 4 - Episode 3 - Aired 12/2/2021

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

Red Directive
star
7.22
1532 votes

#6 - Red Directive

Season 5 - Episode 1 - Aired 4/4/2024

Discovery investigates an ancient Romulan vessel where they face-off with some unexpected guests and uncover a vast mystery that sends them on a race across the galaxy. Meanwhile, Saru is presented with a unique opportunity.

Rosetta
star
7.25
1923 votes

#7 - Rosetta

Season 4 - Episode 11 - Aired 3/3/2022

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.

Mirrors
star
7.27
1296 votes

#8 - Mirrors

Season 5 - Episode 5 - Aired 4/25/2024

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.

Directors: Jen McGowan
Anomaly
star
7.28
2352 votes

#9 - Anomaly

Season 4 - Episode 2 - Aired 11/25/2021

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.

Life, Itself
star
7.28
1335 votes

#10 - Life, Itself

Season 5 - Episode 10 - Aired 5/30/2024

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.

Under the Twin Moons
star
7.29
1408 votes

#11 - Under the Twin Moons

Season 5 - Episode 2 - Aired 4/4/2024

On the heels of their startling discovery, Captain Burnham and the crew investigate a seemingly abandoned planet in their continued quest to solve the galaxy’s greatest mystery. Meanwhile, Saru helps Burnham make an important decision.

The Galactic Barrier
star
7.34
1922 votes

#12 - The Galactic Barrier

Season 4 - Episode 10 - Aired 2/24/2022

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

The Examples
star
7.35
2125 votes

#13 - The Examples

Season 4 - Episode 5 - Aired 12/16/2021

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.

Directors: Lee Rose
Writer: Kyle Jarrow
Erigah
star
7.35
1275 votes

#14 - Erigah

Season 5 - Episode 7 - Aired 5/9/2024

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.

Directors: Jon Dudkowski
All In
star
7.35
1965 votes

#15 - All In

Season 4 - Episode 8 - Aired 2/10/2022

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

Writer: Sean Cochran
Labyrinths
star
7.36
1240 votes

#16 - Labyrinths

Season 5 - Episode 8 - Aired 5/16/2024

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.

Rubicon
star
7.36
1901 votes

#17 - Rubicon

Season 4 - Episode 9 - Aired 2/17/2022

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.

Directors: Andi Armaganian
…But to Connect
star
7.39
2089 votes

#18 - …But to Connect

Season 4 - Episode 7 - Aired 12/30/2021

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.

Directors: Lee Rose
Terra Firma (1)
star
7.40
2207 votes

#19 - Terra Firma (1)

Season 3 - Episode 9 - Aired 12/10/2020

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

Directors: Omar Madha
The Sanctuary
star
7.42
2242 votes

#20 - The Sanctuary

Season 3 - Episode 8 - Aired 12/3/2020

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

Directors: Jonathan Frakes
Face the Strange
star
7.44
1366 votes

#21 - Face the Strange

Season 5 - Episode 4 - Aired 4/18/2024

On the way to the next clue, the U.S.S. Discovery is sabotaged by a mysterious weapon, leaving Captain Burnham, Rayner, and Stamets as the only crew members who can possibly save the ship in time.

Directors: Lee Rose
Writer: Sean Cochran
Kobayashi Maru
star
7.45
2494 votes

#22 - Kobayashi Maru

Season 4 - Episode 1 - Aired 11/18/2021

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

Terra Firma (2)
star
7.47
2214 votes

#23 - Terra Firma (2)

Season 3 - Episode 10 - Aired 12/17/2020

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

Directors: Chloe Domont
Coming Home
star
7.47
1972 votes

#24 - Coming Home

Season 4 - Episode 13 - Aired 3/17/2022

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.

Lagrange Point
star
7.49
1252 votes

#25 - Lagrange Point

Season 5 - Episode 9 - Aired 5/23/2024

After Moll and the Breen capture a mysterious structure that contains the Progenitors' power, Captain Burnham must lead a covert mission to retrieve it before the Breen figure out how to use it.

Directors: Jonathan Frakes