With Mark Lawson Natalie Haynes reviews the Robert Downey Jr action adventure movie Iron Man 2. Mark Knopfler on Dire Straits' Brothers in Arms, one of the top 10 best-selling albums in UK music history, 25 years after its release. Sir Mark Elder, Musical Director of Manchester's Halle Orchestra, discusses this weekend's performance of Mahler's 8th Symphony in which the Halle Orchestra and their Manchester nieghbours the BBC Philharmonic join forces. Marli Renfro on being Janet Leigh's body double in the Psycho shower scene. Producer Jerome Weatherald.