My (radio) guest tonight/Monday: rebroadcast from 2009, legendary composer Pierre Boulez, Helen Regenstein conductor emeritus of the Chicago Symphony Orchestra. This Wednesday through Sunday, 12 through 16 November, the CSO presents concerts and "Beyond the Score" programs of and in tribute to Boulez and his upcoming 90th birthday. Critical Thinking, 10 p.m. to 11 p.m. CST on 98.7WFMT Chicago and via free streaming at wfmt.com. Subsequently available any time wfmt.com/criticalthinking. See you on the radio!