Bloom finds out that Alfea has a hallway with enemies portraits on the wall such as Lord Darkar, Valtor and the Trix.
The Trix were mentioned by Tecna.
The first episode to feature Roxy, the seventh and final Winx, in the opening sequence.
It is revealed that Enchantix is not technically the last form a fairy wins and there are an infinite amount of higher levels, the next level after Enchantix being Believix. The Winx's Enchantix is also ineffective against the Wizards of the Black Circle, and only the Believix level will combat their power.
In the Nickelodeon version, the Winx's dialogue in the beginning was changed to allude to them becoming teachers.