For the 2012 season's final show, The King and I, executive producer Mike Isaacson blue-penciled his playbill biography. For the first six productions, Isaacson's bio remained pretty standard, chronicling the creative director's extensive theater credits. But for the final week, he threw out the template and replaced the old standby with a bio that was twice as long but contained nary a word about Isaacson. Instead he devoted the space to listing all the behind-the-scenes personnel: stagehands, scenic artists, stage managers, wardrobe and hair staffers — the scores of anonymous people who make the Muny work but who rarely see their names in the program. In an act of unexpected generosity, Isaacson mentioned them all — and reminded us of the quiet artisans at every venue whose tireless dedication makes St. Louis theater work.