Get Smart (1965)

S1E26 Hubert's Unfinished Symphony

Max and the Chief don the personas of music reviewers to assist Hubert, a talented violinist secretly investigating the elusive Big Boss of KAOS. Just as Hubert is about to reveal vital information, he is murdered but manages to conceal a clue within a piece of written music. Max now races against time to save pianist Wolenska, who is targeted with a bomb concealed in the piano where he will play Hubert's final symphony—a last-ditch effort by the Big Boss to maintain his anonymity.