Complex sentence: Thor later appears in the show, voiced by Travis Willingham, in the episode "Field Trip" and is turned into a frog after a fight with a Frost Giant, however the spell is lifted with the help of Spider-Man and his team.
Split into simpler sentences: Thor later appears in the show, voiced by Travis Willingham, in the episode "Field Trip" and is turned into a frog after a fight with a Frost Giant. However the spell is lifted with the help of Spider-Man and his team.