Former TV director ("Marcus Welby, M.D.," "Starsky & Hutch") Randal Kleiser struck lucky at the box-office with his first feature, "Grease" (1978),and then directed another teen-friendly yet mainstream film, "The Blue Lagoon" (1980).The Pennsylvania native moved to Southern California to attend USC. To finance his education, he began to work as a model and actor, appearing in commercials and as an extra in big-budgeted movie musicals like "Camelot" (1967) and "Hello, Dolly!" (1969). After receiving a master's degree in film, he made short films ("Peege" 1973, "Foot Fetish" 1974) before