Demonstrates his growth by defending his mentor, Iruka, and using the Rasengan effectively in a combat situation outside of training.
You can watch the English dubbed version of Naruto on platforms like Hulu and Netflix (availability varies by region). Naruto (Dub) Episode 147
This episode is part of the long stretch of filler that occurred after the Sasuke Recovery Mission. While not canon to the manga, it provides significant closure to the very first conflict of the series (Naruto vs. Mizuki in Episode 1). Demonstrates his growth by defending his mentor, Iruka,