The third son of actor Martin Sheen, intense, square-jawed Charlie Sheen exploded into the public's consciousness as the narrator-grunt of Oliver Stone's autobiographical Vietnam War picture "Platoon" (1986), a deja vu of sorts that returned him to the Philippines, the scene of his first feature film (as an extra), Francis Ford Coppola's "Apocalypse Now" (1979), starring his father. That performance coupled with his role as Michael Douglas' unscrupulous protégé whose naked ambition leads him into conflict with his blue-collar father (played by his real-life dad) in Stone's "Wall Street" the