After he played astronaut David Bowman in 2001, actor Keir Dullea's career seemed ready to blast into a new dimension. Previously known for his portrayals of tortured adolescents in such films as The Hoodlum Priest (1961) and David and Lisa (1962), Dullea appeared in an eclectic mix of movies throughout the '70s and early '80s, though nothing came close to matching the success of his space odyssey. He did, however, win kudos for his stage work, notably for creating the role of Don, a blind man, in 1969's Tony award-winning drama Butterflies Are Free. In 1982, Dullea left Hollywood for good. His family, including his third wife the late director Susie Fuller and two stepdaughters, moved to Westport, Conn., where he still resides. Though the New York City native is a veteran of 23 feature films (including a cameo role in 1984's 2010), Dullea, 61, now does theater almost exclusively. Of his one astronomical mark, Dullea has commented: ''People say, 'Aren't you tired of hearing [about it]?'... I'm in a piece of history.''