That Time I Got Reincarnated as a Slime — Season 4
Demon Lord Rimuru's dream of creating an alliance between humans and monsters takes a step closer to being realized. As Tempest continues to prosper, Granville Rozzo and his granddaughter, Maribel Rozzo, clash with Demon Lord Rimuru over their plan to protect mankind by ruling over them. Meanwhile, in El Dorado, Demon Lord Leon works toward goals of his own. The awakening of a new Hero draws near!
01 New Days
Apr 3, 202624m★ 9.1
Tempest is thriving after the success of its festival, but unexpected trouble has arisen with the new dungeon.
02 The Dungeon Evolves
Apr 10, 202624m★ 8.8
Rimuru and his trusted companions discuss ideas for improving the dungeon.
03 The Avatar Team Is Formed
Apr 17, 202624m★ 7.9
Rimuru, Ramiris, Veldora, and Milim work on perfecting their avatars before facing Team Green Fury.
04 Invitation
Apr 24, 202624m★ 8.0
The Council of the West deliberates on whether to grant membership to Tempest.
05 The First Step
May 8, 202624m★ 8.0
Rimuru attends the meeting that will determine Tempest's membership in the Council of the West.
06 The Council of the West
May 15, 202624m★ 8.3
A list of unreasonable demands from the Council makes Rimuru realize that a deeper plot is in motion.
07 The Mastermind's Identity
May 22, 202624m★ 8.3
An interrogation of Prince Elric's would-be shooter reveals who's pulling the strings behind the Council.
08 The Groundwork of Greed
May 29, 202624m★ 7.6
Glenda reveals all she knows about the Council and the Rozzos, and Rimuru prepares to inspect ancient ruins.
09 Investigating the Ruins
Jun 5, 202624m★ 8.4
The investigation of the ancient ruins of Amrita begins.
10 The Master of Greed
Jun 12, 202624m★ 8.2
Rimuru and Mirabel come face-to-face at last in the ancient ruins.
11 Milim's Friend
Jun 19, 202624m★ 9.2
Rimuru helps Milim confront the Chaos Dragon, a corrupted form of the baby dragon that was once her friend.
12 Tempest Evolves
Jun 26, 202624m★ 7.2
Rimuru shares his plans for Tempest's future, including a new system of government and Council representation.
13 New Companions
Jul 3, 202624m★ 6.5
Ramiris and Veldora are feeling overworked, so they ask Rimuru to find assistants for them.
14 The Black Numbers
Jul 10, 202624m★ 7.5
Diablo returns with new demon subordinates to add to Tempest's ranks.
15 An Unsettling Feeling
Jul 17, 202624m★ 7.0
As Tempest continues to grow and evolve, the Moderate Harlequin Alliance approaches Demon Lord Leon.
16 Gran, the Hero of Dawn
Jul 24, 202624m★ 8.0
Luminus meets with Rimuru to discuss Gran and future plans.
17 Lubelius, the Point of Convergence
Aug 7, 202624m★ 8.0
While Leon seeks Elmesia's help in finding Chloe, Granville's forces invade Lubelius.
18 Turbulence in the West
Aug 14, 2026
- No preview
19 Episode 19
Aug 21, 2026
- No preview
20 Episode 20
Aug 28, 2026
- No preview
21 Episode 21
Sep 4, 2026
- No preview
22 Episode 22
Sep 11, 2026
- No preview
23 Episode 23
Sep 18, 2026
- No preview
24 Episode 24
Sep 25, 2026