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Sword Art Online S4E20 — The Night-Sky Blade
8.4
Sword Art Online•Season 4•Episode 20

The Night-Sky Blade

8.4/10 · 656 votesAug 30, 202023 min

Ranked #6 of 23 in Season 4•+0.4 vs season avg

Discussion

Alice and Asuna head to the World’s End Altar as Kirito confronts Gabriel. Unless he can defeat Gabriel and return to the real world before the maximum-acceleration phase begins, Kirito will have to spend the next 200 years in the Underworld.

Directed byMasakazu Obara
Written byMuneo Nakamoto
Previous episodeE19 · AwakeningNext episodeE21 · Beyond Time
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Seasons4

All1234

Season 4 Episodes23

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The Final Load Test stillE3 7.6

The Final Load Test

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The Night Before Battle stillE5 7.8

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Battle of the Knights stillE6 8.5

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Stigma of the Disqualified stillE7 8.1

Stigma of the Disqualified

Blood and Life stillE8 8.3

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Stacia, the Goddess of Creation stillE10 8.0

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Heartless Choice stillE11 8.1

Heartless Choice

Ray of Light stillE12 8.4

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The War of Underworld stillE13 7.8

The War of Underworld

End to Eternity stillE14 8.8

End to Eternity

Instigation stillE15 7.7

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Code 871 stillE16 7.5

Code 871

Prince of Hell stillE17 7.9

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Memories stillE18 8.6

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Awakening stillE19 8.3

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The Night-Sky Blade stillE20 8.4Now viewing

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Beyond Time stillE21 7.4

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New World stillE23 7.7

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Cast16

Yoshitsugu Matsuoka

Yoshitsugu Matsuoka

Kirito (voice)

Haruka Tomatsu

Haruka Tomatsu

Asuna (voice)

Hiroaki Hirata

Hiroaki Hirata

Klein (voice)

Ai Kayano

Ai Kayano

Alice Synthesis Thirty (voice)

Rina Hidaka

Rina Hidaka

Silica (voice)

Hiroki Yasumoto

Hiroki Yasumoto

Agil (voice)

Isshin Chiba

Isshin Chiba

Critter (voice

Kaori Maeda

Kaori Maeda

Selka (voice)

Taku Yashiro

Taku Yashiro

Iskahn (voice)

Yuhko Kaida

Yuhko Kaida

Dee Eye Ell (voice)

Junya Enoki

Junya Enoki

Lilpilin (voice)

Kanae Itou

Kanae Itou

Yui (voice)

Crew12

T

Tomonori Ota

Key Animation

K

Kou Yoshinari

Key Animation

Kenta Corcoran

Kenta Corcoran

Key Animation

Y

Yoshihiro Kanno

Key Animation

A

Ayaka Minoshima

Key Animation

C

Chisato Nakata

Animation Director

C

Chiaki Furuzumi

Animation Director

M

Muneo Nakamoto

Writer

K

Ken Ootsuka

Storyboard Artist

K

Kohei Tokuoka

Animation Director

A

Akito Takahashi

Key Animation

C

Chiho Fujiwara

Key Animation

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Episode Summary

"The Night-Sky Blade" is episode 20 of Sword Art Online season 4. It scored 8.4/10 from 656 votes, ranking #6 of 23 episodes this season (season average 8.0). Directed by Masakazu Obara and written by Muneo Nakamoto, it aired on August 30, 2020.

Next: E21 · Beyond TimeBest of Season 4