Space Brothers backdrop
Animation•Drama•Sci-Fi & Fantasy

The Best Episodes of Space Brothers Season 1

Every episode of Space Brothers Season 1 ranked from best to worst. Discover the Best Episodes of Space Brothers Season 1!

Binge this in 10h 0m•Peaking at 8.6/10

When they were young, the brothers Mutta and Hibito promised each other they would become astronauts. Now, in 2025, Hibito has followed his dream to become the first Japanese on the moon, but Mutta has

Airs on
Nippon TVYTV
BestEpisodes
WorstEpisodes
BestSeasons
AllEpisodes

Seasons2

All12

Episode Rankings

  1. #1 Fan Favorite
    Space Brothers Season 1 Episode 1 - Little Brother Hibito and Big Brother Mutta
    8.0/10(33 votes)

    #1 - Little Brother Hibito and Big Brother Mutta

    S1:E1

    The year 2006. Two brothers, Nanba Mutta (age 12) and Hibito (age 9), happen to spot a UFO headed for the moon. The experience inspires them to make a certain promise.

    Director:Hiroshi Kugimiya
    Writer:Makoto Uezu

    Be the first to start the conversation for this episode

  2. Space Brothers Season 1 Episode 2 - My Shining Star
    7.9/10(29 votes)

    #2 - My Shining Star

    S1:E2

    With his mother's assistance and Hibito's encouragement, Mutta has been accepted for the New Astronaut Selection Exam. However, unsure of his next step, he visits Sharon, who works at a nearby observatory. After receiving advice from Sharon, Mutta is finally able to make up his mind.

    Director:Hisatoshi Shimizu
    Writer:Makoto Uezu

    Be the first to start the conversation for this episode

  3. Space Brothers Season 1 Episode 3 - The Man with the Advantage and the Running Female Doctor
    8.1/10(27 votes)

    #3 - The Man with the Advantage and the Running Female Doctor

    S1:E3

    After advancing to the second exam, Mutta realizes that the other applicants are much better prepared than he is. Desperate to prove himself, he stakes everything on the lung capacity test, as he has confidence in his trumpet-trained lungs. However, as the other applicants drop out, he finds himself in a heated battle with Itou Serika. Who will come out on top?

    Director:Daiji Suzuki
    Writer:Makoto Uezu

    Be the first to start the conversation for this episode

  4. Space Brothers Season 1 Episode 4 - Next to Hibito
    8.3/10(28 votes)

    #4 - Next to Hibito

    S1:E4

    After a long week, only the final interview remains in the second JAXA exam. Mutta is drawing attention as Nanba Hibito's older brother, but he insists he won't spend his entire life as Nanba Hibito's big brother.

    Director:Unknown
    Writer:Unknown

    Be the first to start the conversation for this episode

  5. Space Brothers Season 1 Episode 5 - Days of Missing
    8.3/10(25 votes)

    #5 - Days of Missing

    S1:E5

    After completing the second JAXA exam, Hibito invites Mutta for a free trip to Houston, Texas, through NASA's family support program. Upon arrival, he finds himself chased by a pug named Apo, and is then reunited with Hibito. However, Hibito expresses disappointment.

    Director:Daisuke Tsukushi
    Writer:Toshizo Nemoto

    Be the first to start the conversation for this episode

  6. Space Brothers Season 1 Episode 6 - Et Cetera in My Head
    8.2/10(22 votes)

    #6 - Et Cetera in My Head

    S1:E6

    Mutta has arrived in America, but he's off to a rocky start with Hibito. Meanwhile, his future as an astronaut is in jeopardy because the headbutt incident has been brought to JAXA's attention.

    Director:Unknown
    Writer:Unknown

    Be the first to start the conversation for this episode

    7. Trending NowTRENDING NOW

    The 20 BEST Episodes of Space Brothers

    READ
  7. Space Brothers Season 1 Episode 7 - Dear Hibito
    8.3/10(18 votes)

    #7 - Dear Hibito

    S1:E7

    After learning that his former boss has told JAXA about the headbutt incident, Mutta has given up hope on passing the exam. To cope, Mutta falls back on his childhood habit of multitasking like crazy when something bad happens.

    Director:Takahiro Harada
    Writer:Toshizo Nemoto

    Be the first to start the conversation for this episode

  8. Space Brothers Season 1 Episode 8 - Smoky Heaven
    8.6/10(23 votes)

    #8 - Smoky Heaven

    S1:E8

    When the robber known as the fire extinguisher man strikes the restaurant where Mutta is, he's in trouble. But once the dust settles, Mutta has become a national hero for capturing the criminal. However, it appears there's more to the story.

    Director:Tomotaka Shibayama
    Writer:Makoto Uezu

    Be the first to start the conversation for this episode

  9. Space Brothers Season 1 Episode 9 - Individual Resolve
    7.9/10(16 votes)

    #9 - Individual Resolve

    S1:E9

    After passing the second JAXA exam, Mutta returns to Japan for the third. He's happy about the exam result, but on the flight back, a nightmare leaves him rattled. This is due to the letters from Hibito that he discovered before leaving.

    Director:Hideaki Uehara
    Writer:Unknown

    Be the first to start the conversation for this episode

  10. Space Brothers Season 1 Episode 10 - Running Bus
    8.3/10(15 votes)

    #10 - Running Bus

    S1:E10

    Mutta has learned that Kenji and Serika have strong reasons to become astronauts, while Mutta is simply trying to achieve a childhood dream. This causes Mutta to begin to question himself.

    Director:Daiji Suzuki
    Writer:Toshizo Nemoto

    Be the first to start the conversation for this episode

  11. Space Brothers Season 1 Episode 11 - Trapped Rivals
    8.2/10(16 votes)

    #11 - Trapped Rivals

    S1:E11

    The third exam will take two weeks. Mutta and the other candidates are transported via sealed bus to a large, barren facility. Then they are led to an area that is known as the last room.

    Director:Unknown
    Writer:Unknown

    Be the first to start the conversation for this episode

  12. Space Brothers Season 1 Episode 12 - My Name Is Itou Serika
    8.6/10(17 votes)

    #12 - My Name Is Itou Serika

    S1:E12

    The fifteen remaining candidates have been divided into three teams of five. Each team will spend two weeks inside a sealed box, while completing various tasks. The first task is to determine the time.

    Director:Daisuke Tsukushi
    Writer:Unknown

    Be the first to start the conversation for this episode

  13. Space Brothers Season 1 Episode 13 - 3-D Ant
    8.1/10(16 votes)

    #13 - 3-D Ant

    S1:E13

    The sealed box teams are assigned more tasks. These include Running Math, five minutes of mental math while running, and a typing test. Next, they're asked to write a letter of protest to a journalist who is criticizing government funding for space exploration.

    Director:Unknown
    Writer:Toshizo Nemoto

    Be the first to start the conversation for this episode

  14. Space Brothers Season 1 Episode 14 - Broken Glasses and the Sole of the Foot
    8.1/10(14 votes)

    #14 - Broken Glasses and the Sole of the Foot

    S1:E14

    After five days in their sealed boxes, each team is exhibiting a pronounced personality. Mutta's Team A is rowdy, while Team C is quiet. However, Kenji's Team B appears to be a little gloomy.

    Director:Unknown
    Writer:Unknown

    Be the first to start the conversation for this episode

  15. Space Brothers Season 1 Episode 15 - Let's Talk About Space
    8.3/10(14 votes)

    #15 - Let's Talk About Space

    S1:E15

    The exam in the sealed box is halfway over. Mutta's Team A suffered an accident when Fukuda's glasses were broken. But Furuya, the one who broke them, requested a new pair. Meanwhile, Team B must deal with an alarm going off in the middle of the night.

    Director:Unknown
    Writer:Unknown

    Be the first to start the conversation for this episode

  16. Space Brothers Season 1 Episode 16 - Alarm, but No Clock
    8.2/10(15 votes)

    #16 - Alarm, but No Clock

    S1:E16

    The third exam is halfway over. Mutta works on a completely white puzzle as he ponders why Fukuda-san would break the only clock in the sealed box.

    Director:Hideaki Uehara
    Writer:Toshizo Nemoto

    Be the first to start the conversation for this episode

  17. Space Brothers Season 1 Episode 17 - The Culprit Is in the Room
    8.4/10(16 votes)

    #17 - The Culprit Is in the Room

    S1:E17

    The third exam inside the sealed boxes has been underway for ten days. Each team has been experiencing unexpected problems, such as broken clocks and mysterious alarms that ring in the middle of the night. However, Mutta soon realizes who is actually responsible.

    Director:Matsuo Asami
    Writer:Unknown

    Be the first to start the conversation for this episode

  18. Space Brothers Season 1 Episode 18 - Roo-ra! Kenji!
    7.9/10(16 votes)

    #18 - Roo-ra! Kenji!

    S1:E18

    The candidates have only a few days left in the sealed boxes. JAXA has been using green cards to create trouble, gauging each member's ability to respond to stress and trouble.

    Director:Yusuke Kamata
    Writer:Makoto Uezu

    Be the first to start the conversation for this episode

  19. Space Brothers Season 1 Episode 19 - The Day Before Goodbye
    8.3/10(16 votes)

    #19 - The Day Before Goodbye

    S1:E19

    The teams have two days left in the sealed boxes. Mission Control has deliberately not given certain members of Kenji's Team B any green cards, leading to paranoia. Meanwhile, in Team A, Mutta announces that he has good news, bad news, and dicey news.

    Director:Yasuo Tsuchiya
    Writer:Unknown

    Be the first to start the conversation for this episode

  20. Space Brothers Season 1 Episode 20 - The Worst Possible Punishment
    8.6/10(17 votes)

    #20 - The Worst Possible Punishment

    S1:E20

    It's their final day in the sealed box. Mutta has enjoyed his two weeks with the team, and he wishes to avert ruining their bond, as they make their final decision.

    Director:Unknown
    Writer:Unknown

    Be the first to start the conversation for this episode

  21. Space Brothers Season 1 Episode 21 - A Long-Awaited Glimpse of the Sky
    8.2/10(14 votes)

    #21 - A Long-Awaited Glimpse of the Sky

    S1:E21

    With the third exam finally over, Furuya takes the opportunity to visit the man who made his dream possible.

    Director:Unknown
    Writer:Unknown

    Be the first to start the conversation for this episode

  22. Space Brothers Season 1 Episode 22 - Working on the Dream
    8.4/10(15 votes)

    #22 - Working on the Dream

    S1:E22

    The third astronaut selection exam has finally ended. Team A used rock-paper-scissors to select two members. Whose dreams are still alive?

    Director:Daiji Suzuki
    Writer:Unknown

    Be the first to start the conversation for this episode

  23. Space Brothers Season 1 Episode 23 - Father, Son, and Mutta Claus
    8.2/10(13 votes)

    #23 - Father, Son, and Mutta Claus

    S1:E23

    Mutta has been picked to go to Houston for the final astronaut selection exam. But because his selection means that Kenji wasn't chosen, he has mixed feelings.

    Director:Shigeru Ueda
    Writer:Unknown

    Be the first to start the conversation for this episode

  24. Space Brothers Season 1 Episode 24 - The Worst Possible Interviewer
    7.8/10(13 votes)

    #24 - The Worst Possible Interviewer

    S1:E24

    The final exam is set to take place in two months. Mutta heads to Houston, ahead of the other candidates to look after Apo and tour the Johnson Space Center. Meanwhile, Hibito is training hard for his lunar mission.

    Director:Hideaki Uehara
    Writer:Unknown

    Be the first to start the conversation for this episode

  25. Space Brothers Season 1 Episode 25 - Sonic Little Brother Training Big Brother
    7.8/10(14 votes)

    #25 - Sonic Little Brother Training Big Brother

    S1:E25

    With the final astronaut selection exam coming up, Mutta heads to Houston. However, Jennifer has some ominous news.

    Director:Daisuke Tsukushi
    Writer:Unknown

    Be the first to start the conversation for this episode

Season 1 Ratings Summary

"Little Brother Hibito and Big Brother Mutta" is the best rated episode of "Space Brothers" season 1. It scored 8/10 based on 33 votes. Directed by Hiroshi Kugimiya and written by Makoto Uezu, it aired on 3/31/2012. This episode is rated 0.1 points higher than the second-best, "My Shining Star".