Susan Dey has been a regular sight on the small screen since her debut, at age 18, on "The Partridge Family". As Laurie, the pretty, sensible, eldest daughter and keyboardist of the traveling musical clan, she exuded an earnest, slightly gawky charm, even when her braces were wreaking havoc with the group's electrical equipment in a memorable episode.After the show went off the air, Dey tried her luck on the big screen playing opposite William Katt in the bland teen romance "First Love" (1977), played the tomboyish Jo March in a TV adaptation of "Little Women" (NBC, 1978) and kept reasonably
