The first cour of That Time I Got Reincarnated as a Slime Season 4 concluded on June 26, 2026, with a heartfelt installment titled “Tempest Evolves.” While the episode featured Rimuru’s political maneuvering and the completion of the revolutionary Magitrain project, its most memorable moment came at the end: the long-awaited hatching of Milim’s dragon egg, introducing the adorable baby dragon Gaia to the world.
Release Date and Streaming Details
That Time I Got Reincarnated as a Slime Season 4 Episode 12 premiered on Friday, June 26, 2026, following the series’ weekly release pattern that began on April 3, 2026. The season, produced by Studio 8-Bit, is set to run for an ambitious five cours, with the first two cours airing consecutively before a break.
International viewers can stream the episode on Crunchyroll, which holds the license for most regions worldwide. The series is also available on Netflix in select regions. Here is the global release schedule for the episode:
- Pacific Time (PDT) – 8:00 AM on June 26, 2026
- Eastern Time (EDT) – 11:00 AM on June 26, 2026
- British Summer Time (BST) – 4:00 PM on June 26, 2026
- Central European Summer Time (CEST) – 5:00 PM on June 26, 2026
- India Standard Time (IST) – 8:30 PM on June 26, 2026
- Japan Standard Time (JST) – 12:00 AM on June 27, 2026
What Happened in Episode 12: A New Era for Tempest
Unlike previous episodes that focused on high-stakes battles or political intrigue, Episode 12 took a quieter approach to showcase the steady growth of the Jura Tempest Federation. The episode covered several significant developments for the nation that Rimuru has built from the ground up.
A Constitutional Government and the Magitrain
The episode showed Rimuru taking steps toward establishing a constitutional government for Tempest, demonstrating his commitment to creating a sustainable and fair society for both monsters and humans. The revolutionary Magitrain project was also completed, marking a major milestone in Tempest’s infrastructure development and connecting the nation to the wider world.
These developments represent the culmination of the nation-building themes that have been central to the series since its beginning. What started as a small village of goblins has grown into a thriving federation with advanced technology and a sophisticated government structure.
Gaia’s Heartwarming Birth
While Tempest celebrated its newest inventions, the episode saved its most emotional scene for the very end. Milim’s dragon egg finally hatched, introducing the tiny baby dragon Gaia. The adorable creature immediately won everyone’s hearts, but especially Milim’s, whose joyful reaction became one of the most wholesome moments in recent series history.
Fans who watched the episode have been commenting on how ending the first cour with Gaia’s arrival was the perfect conclusion. The moment provided a warm, uplifting finish to the season’s first half and set up new possibilities for the future.
The Season Structure and What Lies Ahead
Season 4 is scheduled for a massive run of five cours, though only the first two cours have confirmed release dates. The first cour concluded with Episode 12 on June 26, 2026, and the second cour will begin with Episode 13 on July 3, 2026. The season is expected to have 24 episodes for the first two cours combined.
According to production information, this season covers some of the most anticipated material from the light novels, including story arcs that manga and light novel readers have been waiting years to see animated. The series continues to follow Demon Lord Rimuru’s dream of creating an alliance between humans and monsters, and as Tempest prospers, new challenges continue to emerge.
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The Series That Redefined Isekai
That Time I Got Reincarnated as a Slime follows the story of Mikami Satoru, a corporate worker who is stabbed and killed, only to be reborn in an alternate world as a slime. Now named Rimuru, he uses his unique abilities to build a nation where monsters and humans can coexist peacefully. The series, produced by Studio 8-Bit and directed by Naokatsu Tsuda, has become one of the most popular isekai anime of recent years.
With the completion of the first cour and the heartwarming introduction of Gaia, fans have plenty to look forward to when the series returns with Episode 13 on July 3, 2026. The second cour promises to continue the story with the same blend of world-building, political intrigue, and wholesome moments that have made the series a fan favorite.
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