Space Brothers
S01:E01 - Little Brother Hibito, Big Brother Mutta
In 2006, Mutta (12) and Hibito (9) see a UFO. And 2025, Mutta gets a surprising mail from Hibito.
S01:E02 - My Golden Sparkle
Hesitant to proceed, Mutta visits Sharon, who asks: "What's the shiniest thing in your life?"
S01:E03 - An Advantageous Man and the Running Female Doctor
Feeling outmatched, Mutta faces Serika in the lung test. It's close. Who will outlast the other?
S01:E04 - By Hibito's Side
With the final interview ahead, Mutta fears being seen only as Hibito's brother. Can he stand out?
S01:E05 - Not Enough Days
In Houston, Mutta reunites with Hibito, but overhears surprising words: "Be competitive..."
S01:E06 - Etcetera on Loop in My Head
Mutta visits NASA and sees Hibito's intense training, then hears he may have failed JAXA's test.
S01:E07 - Dear Hibito
Mutta hears his ex-boss badmouthed him to JAXA and spirals into "Korokoro Mutta" mode.
S01:E08 - White Smoke Heaven
Mutta's called a hero for stopping a robber, but as the hype grows, what's the real story?
S01:E09 - Ones Own Resolve
On his way to Japan for the third round of testing, Mutta is shaken by Hibito's written will.
S01:E10 - The Wheels on the Bus Go Round and Round
Mutta feels unprepared next to Kenji and Serika. Sharon helps, and the bizarre test begins.
S01:E11 - Rivals Trapped
The examinees arrive at a bleak site. Led deeper inside, they face the final room and a big choice.
S01:E12 - My Name Is Ito Serika
Teams face their first test: "What time is it?" Mutta stands alone, claiming, "I know a number."
S01:E13 - The 3D Ant
Faced with a tough writing task, Mutta recalls Noguchi's tale of the "three-dimensional ant."
S01:E14 - Broken Glasses and the Sole of the Foot
By day five, tension brews in Team B, while even lively Team A begins to face internal strain.
S01:E15 - Let's Talk About Space!
Team B's sleep is broken by an alarm, while over in Team A, another surprise is on its way.
S01:E16 - An Alarm Without a Clock
The final test begins. Mutta sees Fukuda destroy the clock. But the truth isn't so simple.
S01:E17 - The Culprit Is in This Room
With no clock and alarms blaring, tensions rise. Mutta suspects JAXA may be behind the chaos.
S01:E18 - Go, Kenji!
Mutta learns JAXA's "Green Card" test is behind the chaos, while Team B nears breaking point.
S01:E19 - The Last Day Before Farewell
Two days left. Kenji leads Team B to hope while tensions ease; Mutta prepares a big announcement.
S01:E20 - The Worst Punishment
On the last day, Mutta must choose two astronauts while trying to keep the team's bonds intact.