It seems that if you want to turn a TV show into a success, you cast Susan Dey in a part and let nature take its course. What she did for 'The Partridge Family' she also did for 'L.A. Law.' The show started off on television and progressed into a movie, with Dey playing the same role all the way through.
In her mid-60s, Dey is still young enough to be acting, but appears to have retired. She hasn't appeared on either the big screen or the small screen since 2003. During that time, she broke off all contact with her former 'Partridge Family' co-star David Cassidy, whom she fell in unrequited love with during the making of the show, only for him to release a 'tell all' book on the subject about several years later.