That Time I Got Reincarnated as a Slime

Season 3

TV-14

Rimuru has officially become a Demon Lord after defeating Clayman. Following Walpurgis, the Demon Lords' banquet, Rimuru's domain is expanded to include the entire Great Forest of Jura. Anticipating a flood of representatives from all races showing up to pay their respects, Rimuru decides to throw a festival to commemorate the opening of Tempest, using it as an opportunity to gain new citizens and present Demon Lord Rimuru to the world. Meanwhile, in the Holy Empire of Lubelius, home base of the monster-hating cult of Luminism, Holy Knight Captain Hinata receives a message from Rimuru. But the message is actually a fabricated declaration of war sent by some unknown party. Upon learning that Hinata is heading for Tempest, Rimuru makes a decision... Thus begins a new challenge for Rimuru, striving to distinguish friend from foe in his pursuit of the ideal nation where humans and monsters can prosper together.

Where to Watch Season 3

24 Episodes

Demons and Strategies
E1
Demons and StrategiesRimuru has returned to Jura after having attended Walpurgis. Diablo informs Rimuru of his mission to deal with the Kingdom of Falmuth. Having presented the kingdom with three options at a resolution, the clock on the week for their answer ticks down.
The Saint's Intentions
E2
The Saint's IntentionsYuuki is saddened by the death of Clayman, and Luminus is saddened by the death of Roy. Steeped in sadness, and having lost their friends, they seek their next move against Rimuru, who has grown in power and become a true Demon Lord.
Peaceful Days
E3
Peaceful DaysExpecting visitors from all races to come calling after learning that Rimuru now controls the entire Great Forest of Jura, Rimuru decides to hold a festival to introduce himself and Tempest to the world, with the goal of attracting new citizens.
Everyone Has a Part to Play
E4
Everyone Has a Part to PlayResponding to Rimuru's concerns about monsters in the forest harming humans, Vesta and Kaijin reveal a new invention they hope will keep the road to Tempest safe. Also, Rimuru assigns a new task to Geld.
Meeting of Both Sides
E5
Meeting of Both SidesIn the Holy Empire Lubelius, a military council was being held with Hinata as its leader. Hinata announces that she will try to talk to Rimuru on her own. Meanwhile, a hostile message arrives from Rimuru.
Those Approaching
E6
Those ApproachingThe spread of false information causes the Temple Knights to assemble, endangering Diablo's plan to conquer Falmuth. Meanwhile, Rimuru learns that Hinata is on her way to Tempest.
Saint and Demon Clash
E7
Saint and Demon ClashOn the way to Tempest, Hinata sees the ramen and roads that Rimuru has made, she realizes that Rimuru is serious about wanting humans and monsters to coexist. However, against her will, her subordinate Leonard invades Tempest.
Misunderstanding
E8
MisunderstandingFinally, war breaks out between the Crusaders and Rimuru within Tempest territory. Rimuru faces off against Hinata, who has put everything she inherited from her mentor, Shizu, on the line. What awaits the two in their deadly battle?
The Scheming of the Seven Days
E9
The Scheming of the Seven DaysDiablo descends before the enemy, King Edward of Falmuth. Also present are Saare and Glenda, two of the three Battlesages who are regarded as the most brilliant among the Master Rooks.
God and Demon Lord
E10
God and Demon LordJust as the battle between Hinata and Rimuru was coming to an end, Hinata's sword moved on its own and aimed at Rimuru. Hinata risked her life to protect him but was seriously injured. Then the the Clerics of the Seven Luminaries appeared.
Reconciliation and Agreement
E11
Reconciliation and AgreementThe Seven Days Clergy have been purged, and the battle is over. Rimuru and Hinata hold a meeting to discuss future relations between their two nations, and the masterminds behind the whole conflict, the Eastern merchants, are revealed.
Festival Preparations
E12
Festival PreparationsThe residents of Tempest are busy preparing for the opening ceremony. Rimuru visits his old acquaintance, the merchant Gard Mjöllmile, to brainstorm ideas for creating "entertainment that people will want to come back to again and again."
Invitation for All Nations
E13
Invitation for All NationsDemon Lord Ramiris tries to argue her way into moving to Tempest, where there's great food, hot springs, and ample entertainment. Rimuru happens to walk into the argument and comes up with a way to make use of Ramiris's skills.
Labyrinth and Storm Dragon
E14
Labyrinth and Storm DragonRimuru was building a dungeon in preparation for the opening ceremony. He put Kurobe's weapons in the treasure chests and made Veldora live in the deepest part as the final boss. Then Milim suddenly appeared.
Audience
E15
AudienceNumerous representatives from across the Great Forest of Jura have assembled in Tempest to congratulate Rimuru on his appointment to Demon Lord. Shuna requests holding a three-day audience to meet with them.
Benimaru's Ordeal
E16
Benimaru's OrdealOn the last day of the audience, Rimuru meets Momiji, the representative of the Tengu clan. Their meeting comes after Rimuru had sent Benimaru to the Tengu village to request their permission to build a tunnel through the Kusha Mountains.
The Lightspeed Hero
E17
The Lightspeed HeroWhen Rimuru learns about the elven slave trade he discovers that the organization in question was destroyed by the hero, Masayuki, and that the hero is heading to Tempest with the goal of defeating the Demon Lord.
A Throng of Visitors
E18
A Throng of VisitorsAfter meeting with the various rulers of each country, Rimuru heads to Englassia to invite their students to the opening ceremony. Chloe and friends are overjoyed to see Tempest. It is there they are met by Masayuki, a chosen hero.
Festival Eve
E19
Festival EveThe night before the Opening Festival, Rimuru throws a lavish banquet for all the nobles and royalty visiting Tempest. When the party is in full swing, Empress Elmesia of the Sorcerous Dynasty of Thalion arrives, throwing everyone into chaos.
Nation's Opening Festival
E20
Nation's Opening FestivalDuring the first day of the country opening festival, Rimuru goes around to the events that their friends have been looking forward to. Shion and Shuna's performance along with Vesta and Gabiru's research presentation were both a success.
The Martial Arts Tournament
E21
The Martial Arts TournamentA martial arts tournament is being held! The winner will be given the right to challenge Rimuru. The hero, Masayuki, will be participating in the tournament. Rimuru wants to uncover the hero's true strength, so they get Geld and Gobta to participate.
Settling the Score with the Hero
E22
Settling the Score with the HeroGazel and Elmesia pledge to assist Rimuru with Tempest's lack of funding. Elmesia then proposes an alliance, but she's concerned about the danger Diablo poses.
The Labyrinth Is Opened
E23
The Labyrinth Is OpenedRimuru'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.
After the Festival
E24
After the FestivalRimuru pays the merchants with the gold coins he's procured. The merchants try to garner futher favor, but Rimuru ceases trading with them. Rimuru then gathers his allies and calls for action again the eastern merchants who are operating in secret.