In "QED," Alan Alda portrays one of the great scientists of the 20th century: the late Richard Feynman, a Nobel laureate with a larger-than-life personality and a career that included developing the atom bomb and explaining the puzzle of the space shuttle Challenger's explosion. The title of the play, by the way, is short for both the Latin phrase 'quod erat demonstrandum' (meaning 'that proves it') and for the field of physics Feynman spent much of his life exploring: quantum electrodynamics. But don't think you're in for an evening of inscrutable science talk. Feynman spent his career making science matters intelligible to the public at large and this play honors Feynman's accessible style.