She must prove to the police officer that she really is Hannah Montana.
The Policeman's daughter, a Hannah Montana fan, is not convinced that Miley is Hannah, until Miley sings to her.
The new version of the song "The Best of Both Worlds" was performed at the Season 3 concert, and clips of that were added to the theme song as well.
The creators' names appear in the second to last clip.
This is the final season with Mitchel Musso as a regular cast member.