E1Episode 1
Where to watch
Not streaming yet
Coming soon
No streaming availability found for 21 Days Theory anywhere yet.
Seasons & Episodes
E1
E2Episode 2
E3Episode 3
E4Episode 4
Cast · Directed by Choi Sittichai Chutsiri
More from Patsapon Jansuppakitkun · Lead actor
More like this
21 Days Theory — streaming FAQ
Which OTT platform streams 21 Days Theory?
21 Days Theory isn't streaming anywhere in United States yet.
Is 21 Days Theory on Netflix?
No, 21 Days Theory is not on Netflix in United States as of September 2026.
Is 21 Days Theory on Amazon Prime Video?
No, 21 Days Theory isn't on Amazon Prime Video in United States right now.
Where can I watch 21 Days Theory for free?
21 Days Theory isn't streaming in United States yet, so there's no way to watch it free at the moment.
How many seasons are in 21 Days Theory?
21 Days Theory has 1 season in total (4 episodes). The series concluded in 2022.
Are all episodes of 21 Days Theory out yet?
Yes — all 4 episodes across 1 season of 21 Days Theory are out and available to stream.
Is there a Season 2 of 21 Days Theory?
No — 21 Days Theory ended after 1 season, so there is no Season 2.
Is 21 Days Theory based on a true story?
Yes — 21 Days Theory is based on true events, dramatising real people and events (some details may be fictionalised for the screen).
