<Ul> <Li> The Cosby Show (TV) (1987): Greg Martinson </Li> <Li> Northville Cemetery Massacre (1976): Officer Fedorko </Li> <Li> Somewhere in Time (1980): Tourist in Hall of History </Li> <Li> Fast Forward (1985): Michael Stafford </Li> <Li> Moving (1988): Kevin </Li> <Li> Knightwatch (1988--1989): Calvin Garvey (6 Episodes) </Li> <Li> Nasty Boys (TV) (1989): Alex Wheeler </Li> <Li> The Big Picture (1989): Todd Marvin </Li> <Li> The Young Riders (1990--1992): Noah Dixon (43 Episodes, 1990 - 1992) </Li> <Li> seaQuest DSV (TV) (1993--1996): Commander Jonathan Ford </Li> <Li> Asteroid (TV) (1997): Ben </Li> </Ul> <Li> The Cosby Show (TV) (1987): Greg Martinson </Li> <Li> Northville Cemetery Massacre (1976): Officer Fedorko </Li> <Li> Somewhere in Time (1980): Tourist in Hall of History </Li>

Who played greg martinson on the cosby show