Plot: The BBC Proms season opens at the Royal Albert Hall with a live transmission in simultaneous broadcast with Radio 3 of Beethoven's Missa Solemnis, the first of ten concerts screened on BBC TV this summer. Guest conductor Bernard Haitink returns to the Proms to conduct the BBC Symphony Orchestra and Chorus and BBC Singers, with soloists Karita Mattila (soprano), Catherine Wyn-Rogers (mezzo-soprano), Herbert Lippert (tenor) and Anthony Michaels-Moore (baritone)