That Time I Got Reincarnated as a Slime Watch Order: Every Season, Movie, and the Spin-Off Explained

Short answer: the main story is a straight line. Watch Season 1, then Season 2, then the Scarlet Bond movie, then Season 3, then Season 4 (airing right now). The only other piece to think about is the optional Slime Diaries spin-off, which you can enjoy on the side or skip entirely. Everything else is bonus material.

For a franchise this big, the That Time I Got Reincarnated as a Slime watch order is refreshingly simple, since the numbered seasons run in plain order. The only things that cause any confusion are a movie, a slice-of-life spin-off, and a handful of side stories, and none of them break the main path. Below I lay out the full order, place the Scarlet Bond film, sort out the extras, and cover where the newest season fits, so you can watch That Time I Got Reincarnated as a Slime in order without second-guessing.

The full That Time I Got Reincarnated as a Slime watch order

Here is the recommended first-watch order, with the core seasons marked apart from the optional extras. Follow the numbered entries and slot the spin-off in wherever you like.

The five numbered rows are the whole story of Rimuru, a man killed and reborn in a fantasy world as a weak blue slime, who steadily grows into a Demon Lord and the founder of the monster nation of Tempest. The Slime Diaries, the OVAs, and the side stories are all optional flavor, and I will place each one below. Follow that table top to bottom and you have the complete reincarnated as a Slime watch order sorted.

Where the Scarlet Bond movie fits (and is it canon?)

Scarlet Bond, the franchise's first film, lands right after the events of Season 2, so that is where to watch it. It follows Rimuru and company to the Raja Kingdom for a self-contained adventure with an action-packed plot and some strong character moments.

Its canon status is a little fuzzy: it was supervised by original creator Fuse, but it sits slightly outside the strict light-novel timeline, so purists debate it. Here is the practical call, though. A character introduced in the film shows up again in later content, and the story is genuinely good, so I would watch it rather than skip it. Slot it in after Season 2 and before Season 3 for the smoothest ride.

Do you need to watch The Slime Diaries?

The Slime Diaries is a twelve-episode spin-off, and it is pure optional comfort viewing. Instead of big battles and plot progression, it is a cozy slice-of-life series about the daily lives and comedic antics of Rimuru and the residents of Tempest, loosely bridging the gap between Seasons 1 and 2.

Skip it with zero worry if you only want the main story, since it has no bearing on later events. If you fall in love with this cast, though, it is a delightful hangout, and it works just as well as a relaxed watch after Season 1 or as a palate cleanser once you have caught up. Take it or leave it based on how much extra time in Tempest you want.

What about the OVAs and side stories?

A few smaller pieces round out the franchise, and all of them are optional. Visions of Coleus (also called Coleus' Dream) is a three-episode side story set around the gap between Seasons 1 and 2, though it released much later, so for a first watch it is cleanest to treat it as a standalone extra rather than pausing the main run for it. The OVAs and OADs bundled with the manga are short comedy pieces, fun but inessential. The various recap specials, like Veldora's Journal, just compress episodes you have already seen, so skip those unless you want a quick refresher before a new season.

Is Season 3 (and Season 4) worth it?

Worth flagging honestly: Season 3 shifts the show toward politics and diplomacy, with Rimuru's Jura-Tempest Federation growing into a recognized world power rather than trading blows every episode. If you love the worldbuilding and the sprawling side cast, it is a rewarding stretch. If you mainly show up for Rimuru flattening enemies, it is a slower, talkier ride, so go in knowing the tone has shifted.

The good news is the story is far from over. A fourth season began airing in 2026 as a multi-cour run, picking up right where Season 3 left off, and a second film (Tears of the Azure Sea) arrived alongside it. All told, the main run through Season 3 comes to roughly 30 to 36 hours depending on how many extras you fold in, so the full That Time I Got Reincarnated as a Slime watch order is a real commitment, but one spread across a story that keeps moving somewhere. Anyone catching up now has a clear runway straight into the newest episodes.

Where to watch That Time I Got Reincarnated as a Slime

Crunchyroll is the one-stop home for the franchise, carrying the main seasons, the OVAs, the Scarlet Bond movie, and even the Slime Diaries spin-off, with Season 4 simulcasting as it airs. Some regions have also carried Tensura content on Netflix, and streaming windows for the movie can come and go, so confirm what is live where you are before you reach that point in your watch order.

From slime to Demon Lord, in the right order

For all its seasons and side pieces, the That Time I Got Reincarnated as a Slime watch order boils down to a simple line: Season 1 through Season 4, with the Scarlet Bond movie tucked in after Season 2. Add the Slime Diaries and the side stories if you want more time in Tempest, skip the recaps, and let Rimuru carry you from a confused blue blob to the ruler of a monster nation. Few isekai reward the long haul like this one, and now you can start it knowing exactly where every piece goes.

If you want more anime guides that keep things this clear, slide over to Kaminari, where our anime newsletters dish out fresh news, sharp reviews, and honest takes on everything airing.

FAQ

What order do I watch That Time I Got Reincarnated as a Slime in?

Watch Season 1, then Season 2, then the Scarlet Bond movie, then Season 3, then Season 4. It covers the entire main story in order. The Slime Diaries spin-off and the side-story OVAs are optional extras you can add whenever you like.

Where does the Scarlet Bond movie fit?

Right after Season 2 and before Season 3. It is a mostly self-contained adventure, and while its canon status is debated, a character from it appears in later content, so watching it is recommended rather than required.

Do I need to watch The Slime Diaries?

No. The Slime Diaries is an optional slice-of-life spin-off with no impact on the main plot. Skip it if you only want the story, or enjoy it as a cozy side watch after Season 1.

Is there a Season 4 of That Time I Got Reincarnated as a Slime?

Yes. A fourth season began airing in 2026 as a multi-cour run continuing directly from Season 3, and a second movie has also been announced. The franchise is still ongoing.

Where can I watch That Time I Got Reincarnated as a Slime?

Crunchyroll carries the full franchise, including the main seasons, the Scarlet Bond movie, the OVAs, and the Slime Diaries spin-off, with Season 4 simulcasting as it airs. Availability varies by region, so check what is streaming near you before you start.