‘That Time I Got Reincarnated as a Slime’ Season 4 Episode 21 Release Date, Time and Where to Watch
‘That Time I Got Reincarnated as a Slime’ has kept a steady weekly rhythm through the back half of season four, and the wait for episode 21 has fans checking the calendar again. The show has spent the last few installments unraveling the fallout from the Rozzo family’s schemes, and the last episode left several major threads hanging.
With Rimuru still working through the consequences of his clash with Leon and the fate of key allies still unclear, episode 21 arrives at a point where the story has plenty to resolve. Here is what is confirmed so far about the release date, the international air times, and where the episode will be available to stream.
When Does Episode 21 Release
Episode 21 of ‘That Time I Got Reincarnated as a Slime’ season 4 is scheduled to premiere on Friday, September 4, 2026, continuing the show’s established weekly cadence. The next episode drop follows episode 20 on August 28, with episode 22 already lined up for September 11.
The series has followed a consistent Friday release pattern in Japan, though it has not been entirely without disruption this season. Season 4 previously saw its next new episode bumped from a scheduled July 31 release to a later August date because of broadcast changes in Japan. That earlier shift is a reminder that dates can move even within an active broadcast block.
Season four is a considerably larger undertaking than previous runs of the anime. The series has been officially confirmed to run for 60 episodes total, split across five cours, with the first two cours airing back to back. That structure means episode 21 sits deep into the season’s second cour, well past the halfway point of this initial stretch.
What Time Does Episode 21 Premiere
For viewers tracking exact air times, the schedule has remained fairly consistent throughout the season. New episodes are set to release at 7 a.m. Pacific, 8 a.m. Mountain, 9 a.m. Central, and 10 a.m. Eastern, which translates to roughly 2 p.m. Greenwich Mean Time.
Japan naturally gets the earliest access. Episodes typically debut in Japan around midnight local time on Fridays, with most international audiences seeing the release later that same day in the afternoon UK time and the morning across US time zones. Fans outside Japan should expect episode 21 to become watchable at those same converted hours.
Every episode continues to arrive in its original Japanese audio with subtitles available immediately, and an English dub typically follows. Crunchyroll has been releasing episodes with both English subtitles and an English dub as part of its weekly rollout. That dual format gives viewers flexibility in how they catch up.
Where to Watch Season 4 Episode 21
Streaming access for this season has been fairly broad compared to earlier entries in the franchise. The show airs domestically across a handful of Japanese networks but is available to stream on Crunchyroll for viewers outside Asian territories worldwide.
Beyond Crunchyroll, the series has expanded its footprint. ‘That Time I Got Reincarnated as a Slime’ season 4 can currently be streamed on both Netflix and Crunchyroll. That gives subscribers of either platform a legitimate path to keep up with new episodes as they land.
For those who prefer to purchase rather than subscribe, digital retail options exist as well. The season is also available to buy as a download through Amazon Video and the Apple TV Store, alongside the Crunchyroll Amazon Channel option. On the Japanese broadcast side, the season airs through the NNS network anchored by Nippon TV, along with BS11.
What to Expect Based on the Episode 20 Preview
Episode 21 picks up from a genuinely eventful installment. Episode 20 saw Rimuru continue his battle against Leon while Granbell’s true plan came into focus, using a form of love energy tied to Luminous that made him younger and more dangerous. That twist alone reshapes the threat level heading into the next chapter.
The bigger shock came elsewhere in the same episode. Hinata appeared to be killed during the ongoing conflict, and the spotlight shifted to Chloe as time itself seemed to distort around the moment of her death, with only Rimuru and Chloe retaining awareness before Chloe also vanished. A post credit scene suggested Chloe remembers everything that happened, hinting that her role is far from finished.
Zooming out, the season’s broader ambitions are also still in motion. Rimuru has been working to secure Tempest’s place among the powerful Council of the West even as a hidden figure moves behind the scenes to stop him. With Mariabell already defeated, Granbell Rozzo is preparing for a larger war against Rimuru, and Yuuki Kagurazaka has entered the picture searching for a weapon that Demon Lord Luminous is reportedly hiding, all while the arrival of a new Hero is said to be drawing near.
Given how many threads were left open, episode 21 looks positioned to address Hinata’s fate directly and give some clarity on what Chloe’s reappearance actually means for the fight ahead. Between the Rozzo family’s escalating war plans and the promised new Hero, there is a lot riding on this next installment. What do you think actually happened to Hinata in that final moment, and is Chloe about to change the direction of this entire arc.
