When he walks onto the stage in Oedipus at Colonus, Oedipus is a man at the end of his life, seeking out a place, after years of wandering, where strangers are willing to give him a home despite his past history. When Rachel Kitzinger, the Matthew Vassar Jr. Professor of Greek and Latin Languages and Literature, directed a production of the play this past April in the Fergusson Quadrangle, it was also a kind of homecoming, a return to directing Greek tragedy in the last phase of a career shaped in part by fate.