by The highly anticipated Episode 74, titled “The Evolving Labyrinth,” from Season 4 of That Time I Got Reincarnated as a Slime has officially premiered on April 10. With new developments in the underground labyrinth and rising tensions across the world, this episode marks an exciting turning point in the series.
Fans can now look forward to a deeper exploration of Rimuru’s growing influence and the challenges that come with it.
Episode 74 Overview: “The Evolving Labyrinth”
Synopsis (Beginner-Friendly Explanation)
The underground labyrinth, a major project led by Rimuru, is now thriving. Thanks to clever upgrades and the attraction of large prize rewards, adventurers are pouring in, making the system a huge success.
Rimuru feels relieved as everything seems to be running smoothly—until a new problem arises.
A mysterious group known as Midori Ran appears and begins exploiting loopholes in the labyrinth’s rules to clear it efficiently. This unexpected challenge forces Rimuru and his allies to rethink their strategy and maintain fairness while preserving the labyrinth’s purpose.
This episode focuses on:
- The success of Tempest’s economic and entertainment systems
- Strategic challenges in maintaining balance
- The introduction of new rivals tests Rimuru’s system
Episode 74 Production Staff
- Script: Hitomi Ogawa
- Storyboard: Masashi Kojima, Kenji Yasuda
- Director: Mai Suzuki
- Chief Animation Director: Tomoko Ito
- MC / Episode Highlight: Serika Yamada
The episode showcases strong storytelling combined with dynamic visuals, continuing the high production quality fans expect from the series.
Broadcast and Streaming Details
Fans worldwide can watch the episode through multiple platforms:
TV Broadcast
- NTV Network (FRIDAY ANIME NIGHT / FuraAni): Every Friday at 11:00 PM (JST)
- BS11: Every Saturday at 10:00 PM
- AT-X: Every Sunday at 9:30 PM
- Animax: Every Saturday at 8:00 PM (starting May 9)
Online Streaming
- Begins every Saturday at 11:00 PM (JST)
- Available via:
- Unlimited subscription streaming
- Pay-per-view options
This flexible release schedule ensures accessibility for both Japanese and international viewers.
Season 4 Story Overview: A World in Conflict
Season 4 continues the journey of Rimuru Tempest, who has successfully:
- Founded the Jura Tempest Federation
- Strengthened diplomatic ties with multiple nations
- Promoted peaceful coexistence between humans and monsters
The Bigger Vision
Rimuru aims to create a “Human-Demon Co-Prosperity Sphere”, where all races live together in harmony. His nation becomes a symbol of unity and innovation.
However, not everyone supports this vision.
New Threats and Key Antagonists
Granbell Rosso & Mariabelle Rosso
- Granbell: A former hero and influential leader
- Mariabelle: His intelligent and ambitious granddaughter
They believe humanity must dominate to survive and view Rimuru as a major threat. Their schemes begin to shape the political tension of the season.
Demon Lord Leon Cromwell
In the golden city of Eldorado, Leon begins making strategic moves for unknown reasons. His actions hint at a larger conflict that could reshape the balance of power.
The Awakening of a Hero
As multiple factions collide, a new “Hero” is on the verge of awakening. This development could significantly impact the story, especially in the clash between ideals:
- Protection of humanity
- Coexistence of all races
Main Cast and Characters
The anime features a strong voice cast bringing beloved characters to life:
- Rimuru Tempest: Miho Okasaki
- Veldora: Tomoaki Maeno
- Benimaru: Makoto Furukawa
- Shuna: Sayaka Senbongi
- Shion: M・A・O
- Souei: Takuya Eguchi
- Hakurou: Hōchū Ōtsuka
- Gobta: Asuna Tomari
- Ranga: Chikahiro Kobayashi
- Milim: Rina Hidaka
- Diablo: Takahiro Sakurai
- Hinata: Manami Numakura
- Granbell: Daisuke Ono
- Mariabelle: Inori Minase
- Yuuki: Natsuki Hanae
Music and Production Details
- Original Work: Fuse, Taiki Kawakami, Mitsuba
- Studio: Eight Bit
- Director: Naokatsu Tsuda
- Music: R・O・N
Theme Songs
- Opening: “Esora-goto” by Eir Aoi
- Ending: “Katsubou” by CiON
The music continues to enhance the emotional and action-packed scenes of the series.
Why Episode 74 Is Important
Episode 74 is more than just a continuation—it sets up key themes for the rest of the season:
- Shows the complexity of running a growing nation
- Introduces rule-breaking strategies in the labyrinth
- Builds tension with new and existing enemies
- Highlights Rimuru’s evolution as both a leader and strategist
Final Thoughts
That Time I Got Reincarnated as a Slime Season 4 Episode 74 delivers a compelling mix of strategy, world-building, and emerging conflict. The evolving labyrinth is not just a game mechanic—it symbolizes the challenges of maintaining order in a rapidly expanding world.
With new threats rising and alliances shifting, the story is heading toward an intense and unpredictable arc.
