In 1982 in the U.S., PBS aired an 11-part series of Bernstein's late 1970s films for Unitel of the Vienna Philharmonic playing all nine Beethoven symphonies and various other Beethoven works. Bernstein gave spoken introduction and actor Maximilian Schell was also featured on the programs, reading from Beethoven's letters. The original films have since been released on DVD by Deutsche Grammophon. In addition to conducting in New York, Vienna and Israel, Bernstein was a regular guest conductor of other orchestras in the 1980s. These included the Royal Concertgebouw Orchestra in Amsterdam, with whom he recorded Mahler's First, Fourth, and Ninth Symphonies amongst other works; the Bavarian Radio Symphony Orchestra in Munich, with whom he recorded Wagner's "Tristan und Isolde"; Haydn's "Creation"; Mozart's Requiem and "Great Mass in C minor"; and the orchestra of Accademia Nazionale di Santa Cecilia in Rome, with whom he recorded some Debussy and Puccini's "La bohème".