Part I of the series "Glenn Gould Plays Bach" is devoted to Bach's "Art of Fugue." Gould's performance is followed by a lively repartee with Monsaingeon, in which the pianist provides dazzling insights illustrated by music examples. He explains, for example, why he plays some pieces extremely slowly, and bemoans the "musicological overkill" of scholars who insist that Bach's keyboard music should only be played on a harpsichord.

In Part II of the series "Glenn Gould Plays Bach", Gould concentrates on the fugal form in Bach's works, showing us how Bach uses keys like stops on an organ, and how they give him ideas and colours. He performs various fugues from the Well-Tempered Clavier and reveals why he feels the "Art of Fugue" is the work that summed up Bach's life.

Part III in the series "Glenn Gould Plays Bach" spotlights Gould recording Bach's "Goldberg Variations" in a sound studio. In a brief introduction, he reminisces about his first recording of the pieces and explains why he wanted to record them again now, a quarter of a century later. It was to be his last recording of the "Goldberg Variations" and perhaps the last time he played the work: Glenn Gould died the year after the recording was made.