Pamela Sue Martin (born January 5, 1953), is an American actress best known for playing Nancy Drew on The Hardy Boys/Nancy Drew Mysteries TV series and Fallon Carrington Colby on the ABC nighttime soap opera Dynasty.
Born in Westport, Connecticut, Martin began modeling at 17, and appeared in the original film version of The Poseidon Adventure (opposite Gene Hackman) at the age of 19. During the run of Nancy Drew she posed nude for the July 1978 issue of Playboy magazine.
Martin portrayed feisty and spoiled heiress Fallon Carrington Colby on the ABC nighttime soap opera Dynasty from its debut in 1981 through the end of the fourth season in 1984. Martin left of her own accord and the character was "missing and presumed dead" — the series recast the role with actress Emma Samms at the end of the fifth season in 1985.