The second of three sons of Broadway star Jack Cassidy and Oscar-winner Shirley Jones, Patrick Cassidy followed in his parents' footsteps in a career that has encompassed the stage and screen. Tall (6'2"), lanky, with blond hair blue eyes and a dazzling smile, he made his TV acting debut in the cautionary NBC movie "Angel Dusted" in 1981. That same year, Cassidy made his Broadway debut replacing Rex Smith as the male ingenue Frederick in the revisionary take on Gilbert & Sullivan's "The Pirates of Penzance". His pleasant voice and personable presence quickly won him many fans, although he was