One of my favorite episodes is The Bride of Dracula. It features classic movie monsters Dracula, Wolf Man and Frankenstein.
Dracula once again places her under his spell and when Spider-Man and Iceman arrive, he commands her to destroy them. Spider-Man manages to fight off the attack by reaching her subconscious. The ordeal takes it's toll and she passes out, turning back into Angelica. The duo then escape with her deeper into Dracula's castle. Having discovered Dracula’s laboratory, Iceman fends off Frankenstein (who is another one of Dracula's servants) and the Wolf Man as Spider-Man develops a potion to revive Angelica. She then transforms into Firestar and casts a blaze of sunlight throughout the castle, reverting everything back to normal. The trio return back to the spring dance. You watch the episode below. The entire series is currently streaming on Netflix.