Program I opens the 12-13 Season with works by leading choreographers of the 20th century. Returning to the repertory after long absences are George Balanchine’s APOLLO, from 1928 with its ravishing Stravinsky score, and Sir Frederick Ashton’s LES PATINEURS - also called THE SKATING PARTY -- with all the charm and nostalgia it’s been celebrated for since it was first seen in 1937. And, in a very different mood, Paul Taylor’s tango-flavored spectacular PIAZZOLLA CALDERA closes the exciting program, with its seductive choreography and thrilling Piazzolla music.