Is Dr. Stone Episode 21 Filler?
No — Episode 21 is Canon. This episode directly adapts content from the Dr. Stone manga and contains story-critical events. We strongly recommend watching all canon episodes to follow the main plot without missing key developments.
Episode Overview
The Dr. Stone Main arc of Dr. Stone continues with Episode 21: "Episode 21". Story developments in this episode are drawn directly from the Dr. Stone manga and carry forward the main plot. Episode 21 is story-critical. Watch it before continuing to the next episode.
Episode information is collated from multiple community sources and may contain inaccuracies.
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