Marvel's Ultimate Spider-Man

Season 1, Episode 9

Episode Title: Field Trip

Air Date: 2012-05-20

Overview:

While on a field trip, Spider-Man and his superhero friends encounter the mighty Thor, who is transformed into a frog by his mischievous half-brother Loki. Now, the heroes must venture to the magical world of Asgard in order to save the nine realms from Loki's wrath.