The latest episode of That Time I Got Reincarnated as a Slime took viewers on a 2,000-year journey through time, revealing shocking connections between Chloe, Hinata, and the legendary hero Chronoa. Episode 21, titled “Chronoa the Hero, Part Two,” aired on September 4, 2026, and delivered some of the most emotional moments of the entire season. The episode peeled back layers of the series’ history, showing how events from centuries ago directly connect to Rimuru’s present-day struggles.
Episode 21 Release Date and Where to Watch
Episode 21 of Season 4 premiered on Friday, September 4, 2026. The episode aired in Japan on NTV’s Friday Anime Night programming block at approximately 12:00 AM JST. For international audiences, the episode became available on Crunchyroll at 7:00 AM PT / 10:00 AM ET.
Viewers around the world could watch the episode through multiple platforms. Crunchyroll streamed the season across North America, Central America, South America, Europe, Africa, Oceania, the Middle East, CIS, and Southeast Asia. Other streaming services like Bstation (Bilibili) , iQIYI, and Muse Indonesia’s YouTube channel also carried the episode with subtitles in various languages.
The episode was also available through Crunchyroll’s Amazon Channel, and viewers could purchase digital copies on Amazon Video and Apple TV.
The 2,000-Year Journey Through Time
Episode 21 continued the flashback storyline that began in the previous episode, taking viewers back 2,000 years to explore the origins of Chloe and Hinata. The episode revealed that Chloe possesses the ability to travel back in time whenever Hinata dies. However, this current timeline presented a major difference—Hinata died before Rimuru, which had never happened in previous cycles.
This change in the timeline became a crucial clue about Chronoa’s true identity and the possible future that awaits the characters. Chloe and Hinata, realizing something was different this time, decided to change the outcome to prevent a dark future.
The episode showed Chloe and Hinata traveling together, fighting alongside each other, and helping people across the centuries. Their relationship deepened as they became legendary figures in the world’s history.
Hinata’s Heroic Role Revealed
Episode 21 gave Hinata Sakaguchi a proper chance to become the hero she was always meant to be. The episode revealed that Hinata is connected to the hero’s history more than viewers previously knew. Her control over Chronoa’s body helped her accomplish remarkable things.
One of the most entertaining sequences involved Hinata’s confrontation with Veldora. Veldora had previously battled Hinata, but he was not aware that this event had taken place. Because of that past encounter, Hinata now had information she could use against him.
Hinata’s journey was never easy—she had to fight through powerful enemies. But overcoming her past and finding a purpose made her character truly inspiring.
Shizue Izawa’s Emotional Return
Perhaps the most emotional moment of Episode 21 was the return of Shizue Izawa. Seeing Shizue again immediately brought back memories from the beginning of Rimuru’s journey. But the episode added an entirely new layer to her importance by revealing more about the people who influenced her life.
The connections became almost unbelievable when everything was put together. Hinata mentors Shizue, while Shizue later becomes an important mentor to Hinata and Chloe in the future. This circular relationship added depth to all three characters and showed how their fates were intertwined across centuries.
Fan Reactions to Episode 21
Fans took to social media to share their excitement about the episode. One viewer on X (formerly Twitter) expressed their reaction to the backstory:
“That Time I Got Reincarnated as a Slime S4 Episode 20 Hinata and Chloe’s backstory/lore stuff was so freaking good I actually wasn’t mentally prepared”
The emotional weight of the episode and the revelations about Chronoa’s identity left many viewers stunned. The connections between Chloe, Hinata, Shizue, Veldora, Luminous, and other key characters created a rich tapestry of history that redefined how fans view the entire series.
What Happened in Episode 21
The episode followed Hinata as she woke up in a strange void after her death. She observed visions of her past life before Chloe’s voice suddenly woke her up and told her to approach a white light that appeared before her. It was revealed that Hinata’s soul was inside Chloe’s mind, and they had returned 2,000 years into the past, before Lubelius was built.
Chloe finally revealed her ability to return to the past. However, this ability only activated when Hinata was killed. In previous timelines, Chloe always returned after Hinata was killed following Rimuru’s death, such as during the Eastern Empire attack that caused Veldora to rampage. But this time, things were different—Hinata died before Rimuru.
Chloe also revealed that Shizu’s mask was actually a gift from Rimuru in the past. This detail connected multiple storylines and showed how Rimuru’s influence extended far beyond what anyone realized.
The Chronoa Mystery Deepens
Episode 21 focused heavily on uncovering the secrets of Chronoa, the hero who sealed the Storm Dragon Veldora and was later revived by Granville. In her previous life, Chronoa had connections to both Chloe and Hinata.
The episode revealed that Chloe used the name Chronoa to hide her identity during her travels. During this time, she interacted with Luminous and became involved in important events connected to Veldora and Lubelius.
The mystery of Chronoa’s identity and the connection to the time loops continued to be a central focus of the episode.
Manga Adaptation and Story Progression
Episode 21 of the anime is expected to continue adapting Chapter 144 of the manga. After revealing Chloe and Hinata’s past, the plot is set to return to the present timeline in Lubelius, where Rimuru and Leon are facing off against Chronoa.
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Episode Timing for Different Regions
For viewers in different parts of the world, here is when Episode 21 became available:
- Argentina: 12:00 PM
- Mexico: 9:00 AM
- Colombia: 10:00 AM
- Venezuela: 11:00 AM
- Spain: 5:00 PM
- Canary Islands: 4:00 PM
Indonesian viewers could watch the episode on Friday night, September 4, 2026, at approximately 10:00 PM WIB.
Also Read: That Time I Got Reincarnated as a Slime Season 4 Episode 20 Recap: Chronoa the Hero Part One Brings Major Revelations
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