S3, E19: Arnold, Gerald, Helga, and Pheobe are all chosen to work together on a History project, and Helga and Arnold pour pain on each other. Grandpa tells Arnold about his share of girl trouble with his now wife, Gertrude. P.S. 118 is have a school dance, and Arnold is chosen to provide the music entertainment for everyone, and when Dino Spumoni agrees to play his farwell concert there, he signs a depressing song.