Sword Art Online

Sword Art Online (2012 – 2020)

2012 • 4 seasons • Animation, Sci-Fi & Fantasy • TV-MA

On August 10, 2026

#1611 ▲ 412

1611th by attention TV show online

7,851.6 Attention Score

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Overview Watch Cast Seasons (4) Episodes Ranked Similar Videos Images

photo from the episode

Episode 20 — The Night-Sky Blade

Season 4 • Sword Art Online

Released: 2020-08-30 • Animation/Sci-Fi & Fantasy/Action & Adventure

88%

User score

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.

Where to Stream Episode 20

Season 4 · Episode 20 · Streaming in USA

JustWatch

Crunchyroll Amazon Channel

Episodes

Episode 1
In the Far North
2019-10-13

Episode 2
Raids
2019-10-20

Episode 3
The Final Load Test
2019-10-27

Episode 4
Dark Territory
2019-11-03

Episode 5
The Night Before Battle
2019-11-10

Episode 6
Battle of the Knights
2019-11-17

Episode 7
Stigma of the Disqualified
2019-11-24

Episode 8
Blood and Life
2019-12-01

Episode 9
Sword and Fist
2019-12-08

Episode 10
Stacia, the Goddess of Creation
2019-12-15

Episode 11
Heartless Choice
2019-12-22

Episode 12
Ray of Light
2019-12-29

Episode 13
The War of Underworld
2020-07-12

Episode 14
End to Eternity
2020-07-19

Episode 15
Instigation
2020-07-26

Episode 16
Code 871
2020-08-02

Episode 17
Prince of Hell
2020-08-09

Episode 18
Memories
2020-08-16

Episode 19
Awakening
2020-08-23

Episode 20
The Night-Sky Blade
2020-08-30

Episode 21
Beyond Time
2020-09-06

Episode 22
Alice
2020-09-13

Episode 23
New World
2020-09-20

Information

Episode air date	30.08.2020
Episode runtime	24 min
Episode rating	8.80
Genres	Animation / Sci-Fi & Fantasy / Action & Adventure
TMDB series rating	8.2
IMDb series rating	7.5
Series status	Ended
Age rating	17+
Country	JP

Trailer of Season 4

Additional videos

Official Trailer

Official Trailer

▶

Season 2 Teaser

Season 2 Teaser

▶

English Dub Trailer

English Dub Trailer

▶

Cast

Yoshitsugu Matsuoka

Yoshitsugu Matsuoka
Kirito (voice)

Haruka Tomatsu
Asuna (voice)

Hiroaki Hirata
Klein (voice)

Ai Kayano
Alice Synthesis Thirty (voice)

Rina Hidaka
Silica (voice)

Hiroki Yasumoto

Hiroki Yasumoto
Agil (voice)

Isshin Chiba
Critter (voice

Kaori Maeda
Selka (voice)

Taku Yashiro
Iskahn (voice)

Yuhko Kaida
Dee Eye Ell (voice)

Junya Enoki
Lilpilin (voice)

Kanae Itou
Yui (voice)

Miyuki Sawashiro

Miyuki Sawashiro
Sinon (voice)

Ayahi Takagaki
Lisbeth (voice)

Ayana Taketatsu

Ayana Taketatsu
Leafa (voice)

Sanae Kobayashi

Sanae Kobayashi
Rinko Koujiro (voice)

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