Actor David Selby was fondly remembered by legions of fans for his first major TV role, Quentin Collins, the tormented werewolf-turned-immortal, on the gothic daytime serial "Dark Shadows" (ABC, 1966-1971). Classically trained on the stage, he suddenly found himself in the midst of a true pop-culture phenomenon when he joined the cast of the supernatural-themed soap opera in 1968. After appearing in the second feature film based on the series, "Night of Dark Shadows" (1971), Selby went on to appear in the under-appreciated action comedy "The Super Cops" (1973). Sporadic TV guest appearances and supporting film roles proceeded for a time before he took on a leading role in the long-running primetime melodrama "Falcon Crest" (CBS, 1982-1990). Other film roles included a turn in the family sports comedy "D3: The Mighty Ducks" (1996), and appearances on such highly regarded series as "Mad Men" (AMC, 2006- ). He also lent strong support to a film that tapped into the cultural zeitgeist in "The Social Network" (2010). With a career spanning more than 40 years, Selby continued to deliver charismatic performances in both film and on television, usually tinted with a bit of darkness, but always undeniably human.