S03E23: The Labyrinth Is Opened
Rimuru's dungeon is finally revealed, and his new ally Masayuki is among its first challengers. Later, after the festival is over, Rimuru's biggest job still awaits.
Previous Episode 
Season 1
The Storm Dragon, Veldora
S1E1 / 02 Oct 2018
Meeting the Goblins
S1E2 / 09 Oct 2018
Battle at the Goblin Village
S1E3 / 16 Oct 2018
In the Kingdom of the Dwarves
S1E4 / 23 Oct 2018
Hero King, Gazel Dwargo
S1E5 / 30 Oct 2018
Shizu
S1E6 / 06 Nov 2018
Conqueror of Flames
S1E7 / 13 Nov 2018
Inherited Will
S1E8 / 20 Nov 2018
Attack of the Ogres
S1E9 / 27 Nov 2018
The Orc Lord
S1E10 / 04 Dec 2018
Gabiru is Here!
S1E11 / 11 Dec 2018
The Gears Spin Out of Control
S1E12 / 18 Dec 2018
The Great Clash
S1E13 / 25 Dec 2018
The One Who Devours All
S1E14 / 08 Jan 2019
The Jura Forest Alliance
S1E15 / 15 Jan 2019
Demon Lord Milim Attacks
S1E16 / 22 Jan 2019
The Gathering
S1E17 / 29 Jan 2019
Evil Creeps Closer
S1E18 / 05 Feb 2019
Charybdis
S1E19 / 12 Feb 2019
Yuuki Kagurazaka
S1E20 / 19 Feb 2019
Shizu-san's Students
S1E21 / 26 Feb 2019
Conquering the Labyrinth
S1E22 / 05 Mar 2019
Saved Souls
S1E23 / 12 Mar 2019
Black and the Mask
S1E24 / 19 Mar 2019
Season 2
Rimuru's Busy Life
S2E1 / 12 Jan 2021
Trade with the Animal Kingdom
S2E2 / 19 Jan 2021
Paradise, Once More
S2E3 / 26 Jan 2021
The Scheming Kingdom of Falmuth
S2E4 / 02 Feb 2021
Prelude to the Disaster
S2E5 / 09 Feb 2021
The Beauty Makes Her Move
S2E6 / 16 Feb 2021
Despair
S2E7 / 23 Feb 2021
Hope
S2E8 / 02 Mar 2021
Putting Everything on the Line
S2E9 / 09 Mar 2021
Megiddo
S2E10 / 16 Mar 2021
Birth of a Demon Lord
S2E11 / 23 Mar 2021
The One Unleashed
S2E12 / 30 Mar 2021
The Visitors
S2E13 / 06 Jul 2021
A Meeting of Humans and Monsters
S2E14 / 13 Jul 2021
Ramiris's Warning
S2E15 / 20 Jul 2021
The Congress Dances
S2E16 / 27 Jul 2021
The Eve of Battle
S2E17 / 03 Aug 2021
The Demon Lords
S2E18 / 10 Aug 2021
The Signal to Begin the Banquet
S2E19 / 17 Aug 2021
On This Land Where It All Happened
S2E20 / 24 Aug 2021
Adalman, the Index Finger
S2E21 / 31 Aug 2021
Demon Lords' Banquet ~Walpurgis~
S2E22 / 07 Sep 2021
Returning from the Brink
S2E23 / 14 Sep 2021
Octagram
S2E24 / 21 Sep 2021
Season 3
Demons and Strategies
S3E1 / 05 Apr 2024
The Saint's Intentions
S3E2 / 12 Apr 2024
Peaceful Days
S3E3 / 19 Apr 2024
Everyone Has a Part to Play
S3E4 / 26 Apr 2024
Meeting of Both Sides
S3E5 / 03 May 2024
Those Approaching
S3E6 / 10 May 2024
Saint and Demon Clash
S3E7 / 17 May 2024
Misunderstanding
S3E8 / 24 May 2024
The Scheming of the Seven Days
S3E9 / 31 May 2024
God and Demon Lord
S3E10 / 07 Jun 2024
Reconciliation and Agreement
S3E11 / 14 Jun 2024
Festival Preparations
S3E12 / 21 Jun 2024
Invitation for All Nations
S3E13 / 28 Jun 2024
Labyrinth and Storm Dragon
S3E14 / 05 Jul 2024
Audience
S3E15 / 19 Jul 2024
Benimaru's Ordeal
S3E16 / 26 Jul 2024
The Lightspeed Hero
S3E17 / 02 Aug 2024
A Throng of Visitors
S3E18 / 16 Aug 2024
Festival Eve
S3E19 / 23 Aug 2024
Nation's Opening Festival
S3E20 / 30 Aug 2024
The Martial Arts Tournament
S3E21 / 06 Sep 2024
Settling the Score with the Hero
S3E22 / 13 Sep 2024
The Labyrinth Is Opened
S3E23 / 20 Sep 2024
After the Festival
S3E24 / 27 Sep 2024
Season 4
New Days
S4E1 / 03 Apr 2026
The Dungeon Evolves
S4E2 / 10 Apr 2026
The Avatar Team Is Formed
S4E3 / 17 Apr 2026
Invitation
S4E4 / 24 Apr 2026
The First Step
S4E5 / 08 May 2026
The Council of the West
S4E6 / 15 May 2026
The Mastermind's Identity
S4E7 / 22 May 2026
The Groundwork of Greed
S4E8 / 29 May 2026
Investigating the Ruins
S4E9 / 05 Jun 2026
The Master of Greed
S4E10 / 12 Jun 2026
Miho Okasaki
Rimuru (voice)
Tomoaki Maeno
Veldora (voice)
Takuya Eguchi
Souei (voice)
Hochu Otsuka
Hakurou (voice)
Asuna Tomari
Gobta (voice)
Chikahiro Kobayashi
Ranga (voice)
Jun Fukushima
Gabiru (voice)
