This episode continues to showcase Sakura's evolution. No longer a bystander, she uses the medical ninja training she received from Tsunade to dodge Sasori's lethal attacks and support Chiyo in battle. Why This Episode Matters Episode 21 is highly regarded by fans for several reasons:
The Cursed Warrior – Naruto (Season 4, Episode 21) - Apple TV (CA) Naruto Shippuuden (Dub) Episode 21
By introducing the Third Kazekage puppet, the show demonstrates just how dangerous the Akatsuki are—they are capable of killing and "repurposing" even the strongest Kage-level shinobi. This episode continues to showcase Sakura's evolution
While some viewers found parts of this arc wordy, the visual reveal of Sasori's true form and the transition into high-stakes puppet combat are considered highlights of the early Shippuden seasons. Naruto Shippuuden (Dub) Episode 21