Isekai Quartet backdrop
Comedy•Animation

The Worst Episodes of Isekai Quartet

Every episode of Isekai Quartet ranked from worst to best. Explore the Worst Episodes of Isekai Quartet!

Binge this in 2h 23m•Peaking at 9.0/10

A mysterious switch appeared one day. Upon pressing it, they were sent to a different alternative world!! There are also characters from other alternative worlds gathered together...!?

Airs on
ABEMA
BestEpisodes
WorstEpisodes
BestSeasons
AllEpisodes

Seasons3

All123

Episode Rankings

  1. #1 Worst Episode
    Click to reveal
    Isekai Quartet Season 3 Episode 11 - Melody! Music Festival
    7.3/10(13 votes)

    #1 - Melody! Music Festival

    S3:E11

    The school will have to face a giant zombie bell before receiving the festival prize.

    Director:Unknown
    Writer:Unknown

    Be the first to start the conversation for this episode

  2. Isekai Quartet Season 3 Episode 8 - Popular! Online Game
    7.6/10(19 votes)

    #2 - Popular! Online Game

    S3:E8

    Everyone starts skipping when a new hit game comes out.

    Director:Unknown
    Writer:Unknown

    Be the first to start the conversation for this episode

  3. Isekai Quartet Season 3 Episode 10 - Terror! Music Festival
    7.7/10(17 votes)

    #3 - Terror! Music Festival

    S3:E10

    The day of the music festival arrives, but, naturally, it won't take place without some setbacks.

    Director:Unknown
    Writer:Unknown

    Be the first to start the conversation for this episode

  4. Isekai Quartet Season 1 Episode 7 - Carry Out! Class Rep
    7.8/10(81 votes)

    #4 - Carry Out! Class Rep

    S1:E7

    Emilia's the class rep now, but it's really hard. But she wants to do her best!

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  5. Isekai Quartet Season 2 Episode 1 - Join the Fight! Transfer Student
    7.8/10(74 votes)

    #5 - Join the Fight! Transfer Student

    S2:E1

    The students have now finally settled into their new lives, but a new student has come to the school, and his name is… "Shield"?

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  6. Isekai Quartet Season 2 Episode 3 - Uh-Oh! Detention!
    7.8/10(71 votes)

    #6 - Uh-Oh! Detention!

    S2:E3

    This new world is a great place: no fighting, no danger, and the classes are easy. But you REALLY don't want to get detention!

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

    7. Trending NowTRENDING NOW

    The 20 BEST Episodes of Isekai Quartet

    READ
  7. Isekai Quartet Season 2 Episode 8 - Challenge! Part-Time Job
    7.8/10(69 votes)

    #7 - Challenge! Part-Time Job

    S2:E8

    Visha's been working overtime lately. But what does she need the money for?

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  8. Isekai Quartet Season 2 Episode 9 - Investigate! First Errand
    7.8/10(70 votes)

    #8 - Investigate! First Errand

    S2:E9

    It's time for a play! But what kind of play should they put on? Filo will find out!

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  9. Isekai Quartet Season 2 Episode 10 - Rise Up! School Festival
    7.8/10(68 votes)

    #9 - Rise Up! School Festival

    S2:E10

    It's time for a school festival! But something is lurking outside the school…

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  10. Isekai Quartet Season 2 Episode 11 - It Begins! School Festival
    7.8/10(67 votes)

    #10 - It Begins! School Festival

    S2:E11

    The curtain rises on the school festival! There's a special guest, too…

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  11. Isekai Quartet Season 1 Episode 1 - Come Together! Quartet
    7.9/10(90 votes)

    #11 - Come Together! Quartet

    S1:E1

    Mysterious buttons appear in the worlds of Tanya the Evil, KonoSuba, Overlord, and Re:Zero. When the characters push them, they're taken to a place they'd never imagined...

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  12. Isekai Quartet Season 1 Episode 2 - Tension! Introductions
    7.9/10(82 votes)

    #12 - Tension! Introductions

    S1:E2

    Now that everybody's settled in, it's time for the first day of school, which means everybody has to introduce themselves.

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  13. Isekai Quartet Season 1 Episode 3 - Deadlock! Classmates
    7.9/10(82 votes)

    #13 - Deadlock! Classmates

    S1:E3

    The students begin to wonder about why they are here, and what this school really is. Tanya, in particular, has a theory about Ains...

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  14. Isekai Quartet Season 1 Episode 6 - Decision! Class Rep
    7.9/10(81 votes)

    #14 - Decision! Class Rep

    S1:E6

    It's time to pick the class rep! But Aqua doesn't want Ains to do it, and Albedo doesn't want Aqua anywhere near the job.

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  15. Isekai Quartet Season 2 Episode 2 - Sneak In! The Principal's Office
    7.9/10(72 votes)

    #15 - Sneak In! The Principal's Office

    S2:E2

    Life's great in this world, except for one thing: there's no alcohol! When the students sneak into the principal's office to get their fix from his stash, they run into more than they bargained for.

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  16. Isekai Quartet Season 2 Episode 7 - Excitement! Physicals Day
    7.9/10(69 votes)

    #16 - Excitement! Physicals Day

    S2:E7

    It's time for physicals, and everybody's ready to get naked and get on the scale! Who will be brave enough to go peek at the opposite sex?

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  17. Isekai Quartet Season 3 Episode 5 - Attack! Of the Spear Hero
    7.9/10(22 votes)

    #17 - Attack! Of the Spear Hero

    S3:E5

    Motoyasu comes to the school, but he sees every girl he meets as a pig.

    Director:Unknown
    Writer:Unknown

    Be the first to start the conversation for this episode

  18. Isekai Quartet Season 2 Episode 12 - The Show Begins! Showtime
    8.0/10(69 votes)

    #18 - The Show Begins! Showtime

    S2:E12

    The mobile fortress "Destroyer" has joined the last game! It's up to the quartet to grab its headband and win the game.

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  19. Isekai Quartet Season 3 Episode 3 - Working Together! Morning Glories
    8.0/10(25 votes)

    #19 - Working Together! Morning Glories

    S3:E3

    The class works together to grow morning glories.

    Director:Unknown
    Writer:Unknown

    Be the first to start the conversation for this episode

  20. Isekai Quartet Season 3 Episode 9 - Get Closer! Music Festival
    8.0/10(21 votes)

    #20 - Get Closer! Music Festival

    S3:E9

    The classes are suddenly told about an upcoming music festival.

    Director:Unknown
    Writer:Unknown

    Be the first to start the conversation for this episode

  21. Isekai Quartet Season 1 Episode 8 - Prepare! Field Trip
    8.1/10(85 votes)

    #21 - Prepare! Field Trip

    S1:E8

    It's time for a field trip to the beach, and the gang's getting ready. But who wants to see Kazuma in a swimsuit?

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  22. Isekai Quartet Season 1 Episode 11 - Work Together! Field Day
    8.1/10(83 votes)

    #22 - Work Together! Field Day

    S1:E11

    Field Day is here, and it's lots of fun for everyone. There's tug of war, scavenger hunts... and giant robots?!

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  23. Isekai Quartet Season 2 Episode 4 - Pinch! Test of Learning
    8.1/10(69 votes)

    #23 - Pinch! Test of Learning

    S2:E4

    It's time for a test! Everybody expects Ains to score highly, but… he never even passed middle school!

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  24. Isekai Quartet Season 1 Episode 4 - Encounter! Classmates
    8.2/10(87 votes)

    #24 - Encounter! Classmates

    S1:E4

    The students realize that they're all from other worlds, and begin to share their backgrounds. But some are luckier than others...

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

  25. Isekai Quartet Season 1 Episode 5 - Explosion! Talent Show
    8.2/10(85 votes)

    #25 - Explosion! Talent Show

    S1:E5

    It's time for the talent show, but none of the students are talented at all. The KonoSuba crowd in particular...

    Director:Minoru Ashina
    Writer:Minoru Ashina

    Be the first to start the conversation for this episode

Worst Episodes Summary

"Melody! Music Festival" is the worst rated episode of "Isekai Quartet". It scored 7.3/10 based on 13 votes. Directed by Unknown and written by Unknown, it aired on 12/22/2025. This episode scored 0.3 points lower than the second lowest rated, "Popular! Online Game".