In WHEN THE WORLD WAS GREEN by Sam Shepard, an old man (Peter Coriaty) is interrogated by a young interviewer(Alia Tarraf) about a murder he committed. His victim was not, it seems, the man he intended to kill as part of a generations-old blood feud, and the interviewer has her own hidden agenda. Spun from a web of meditations on everything from cooking to warfare (and nicely set off by Woody Regan's multicolored piano arrangements played by Larry Chertoff) the play glimmers with Shepardesque themes: the falsness of memory, the gulf between men and women and above all, the uncertainty of identity.