Mister Rogers introduces his viewers to the people who make the music on the set of Mister Rogers’ Neighborhood: John Costa, pianist and musical director, Bob Rawsthorne, percussionist and Carl McVicker, bassist. In Make-Believe story King Friday commands that all neighbors celebrate a “Bass Violin Festival.” But he is the only person who knows how to play the bass violin! The neighbors each find their own creative ways to obey the King’s command.