Sword Art Online

Sword Art Online (2012 – 2020)

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

On August 10, 2026

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1611th by attention TV show online

7,851.6 Attention Score

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photo from the episode

Episode 18 — To the World Tree

Season 1 • Sword Art Online

Released: 2012-11-04 • Animation/Sci-Fi & Fantasy/Action & Adventure

71%

User score

Leafa is making enemies leaving her area and group to team up with Kirito. On their way to neutral Territory, they speak more of the rules and areas of the ALO.

Where to Stream Episode 18

Season 1 · Episode 18 · Streaming in USA

JustWatch

Crunchyroll Amazon Channel

Episodes

Episode 1
The World of Swords
2012-07-08

Episode 2
Beater
2012-07-15

Episode 3
The Red-Nosed Reindeer
2012-07-22

Episode 4
The Black Swordsman
2012-07-29

Episode 5
Murder in the Safe Zone
2012-08-05

Episode 6
Illusionary Avenger
2012-08-12

Episode 7
The Temperature of the Heart
2012-08-19

Episode 8
The Sword Dance of Black and White
2012-08-26

Episode 9
The Blue-Eyed Demon
2012-09-02

Episode 10
Crimson Killing Intent
2012-09-09

Episode 11
The Girl of Morning Dew
2012-09-16

Episode 12
Yui's Heart
2012-09-23

Episode 13
Edge of Hell's Abyss
2012-09-30

Episode 14
The End of the World
2012-10-07

Episode 15
Return
2012-10-14

Episode 16
Land of the Fairies
2012-10-21

Episode 17
Captive Queen
2012-10-28

Episode 18
To the World Tree
2012-11-04

Episode 19
The Lugru Corridor
2012-11-11

Episode 20
General of the Blazing Flame
2012-11-18

Episode 21
The Truth about Alfheim
2012-11-25

Episode 22
Grand Quest
2012-12-02

Episode 23
Bonds
2012-12-09

Episode 24
Gilded Hero
2012-12-16

Episode 25
The World Seed
2012-12-23

Information

Episode air date	04.11.2012
Episode runtime	24 min
Episode rating	7.10
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

Additional videos

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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