Tannhauser, Festspielhaus, Bayreuth, Germany
Festspielhaus, Bayreuth, Germany: New in 2011, Sebastian Baumgarten's Tannhauser is the third of the five 2012 Bayreuth Festival productions to superimpose the concept of its protagonists being the unwitting subjects of a sinister experiment conducted by powers unknown (also implied in Hans Neuenfels's Lohengrin and Christoph Marthaler's Tristan und Isolde). What they are driving at is anyone's gu…