Quick Answer
Once Upon a Time... Space is streaming on YouTube TV, PBS Documentaries Amazon Channel. 26 episodes (~10h total watch time). Availability may vary by region.
Where to Watch Once Upon a Time... Space
Once Upon a Time... Space is currently on YouTube TV, PBS Documentaries Amazon Channel. Keep in mind that catalogs change by region — if you don't see it on your usual service, check the other platforms listed here.
Confirmed Streaming Platforms
Subscription availability by JustWatch
Check Other Platforms
Anime licensing changes by region. If Once Upon a Time... Spaceisn't on your usual service, try these.
About Once Upon a Time... Space
Once Upon a Time... Space differs from the rest of the Once Upon a Time titles in the sense that the series revolve on a dramatic content rather than an educational premise. The series still has a handful of educational information (such as an episode discussing the rings of Planet Saturn). The series succeeds Once Upon a Time... Man. It reprises almost the entire totality of the characters of the previous series and adapts them into a science-fiction context. The story tells about the...
Full details on MyAnimePulseFrequently Asked Questions
Where can I watch Once Upon a Time... Space legally?
Right now, Once Upon a Time... Space is on YouTube TV, PBS Documentaries Amazon Channel. That said, anime licensing varies a lot by country — what's on Netflix in Japan might not be on Netflix in the US. If your go-to platform doesn't have it, try the other services listed above.
Is Once Upon a Time... Space on Netflix or Crunchyroll?
Can't confirm either right now. Both platforms rotate their catalogs pretty often, so it's worth searching directly on each one.
Is Once Upon a Time... Space available with an English dub?
Dub availability depends on the platform. Crunchyroll has been expanding their dubbed library a lot recently, and Funimation (now merged into Crunchyroll) historically had the biggest dub catalog. Check each platform's listing for Once Upon a Time... Space.
Can I watch Once Upon a Time... Space for free?
Crunchyroll offers a free ad-supported tier for some shows. Most other platforms require a subscription, but many offer free trials for new users. Tubi and Pluto TV occasionally have anime in their free rotation too.