Episodes 19
EP 01New DaysTempest is thriving after the success of its festival, but unexpected trouble has arisen with the new dungeon.
EP 02The Dungeon EvolvesRimuru and his trusted companions discuss ideas for improving the dungeon.
EP 03The Avatar Team Is FormedRimuru, Ramiris, Veldora, and Milim work on perfecting their avatars before facing Team Green Fury.
EP 04InvitationThe Council of the West deliberates on whether to grant membership to Tempest.
EP 05The First StepRimuru attends the meeting that will determine Tempest's membership in the Council of the West.
EP 06The Council of the WestA list of unreasonable demands from the Council makes Rimuru realize that a deeper plot is in motion.
EP 07The Mastermind`s IdentityAn interrogation of Prince Elric's would-be shooter reveals who's pulling the strings behind the Council.
EP 08The Groundwork of GreedGlenda reveals all she knows about the Council and the Rozzos, and Rimuru prepares to inspect ancient ruins.
EP 09Investigating the RuinsThe investigation of the ancient ruins of Amrita begins.
EP 10The Master of GreedRimuru and Mirabel come face-to-face at last in the ancient ruins.
EP 11Milim`s FriendRimuru helps Milim confront the Chaos Dragon, a corrupted form of the baby dragon that was once her friend.
EP 12Tempest EvolvesRimuru shares his plans for Tempest's future, including a new system of government and Council representation.
EP 13New CompanionsRamiris and Veldora are feeling overworked, so they ask Rimuru to find assistants for them.
EP 14The Black NumbersDiablo returns with new demon subordinates to add to Tempest's ranks.
EP 15An Unsettling FeelingAs Tempest continues to grow and evolve, the Moderate Harlequin Alliance approaches Demon Lord Leon.
EP 16Gran, the Hero of DawnLuminus meets with Rimuru to discuss Gran and future plans.
EP 17Lubelius, the Point of ConvergenceWhile Leon seeks Elmesia's help in finding Chloe, Granville's forces invade Lubelius.
EP 18Turbulence in the WestAn army of demons advances from the north, leaving the Western Nations in turmoil.
EP 19Death and LossGranville's true plan is revealed, but it may already be too late to stop it.About This Anime
The fourth season of Tensei Shitara Slime Datta Ken. 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! (Source: Crunchyroll News)
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