Betty White joins the cast for the fourth season of the hilarious, award-winning ensemble comedy.

Classy, smart, funny and confident, Mary Richards is the very embodiment of the independent career woman of the 1970s. As news producer for WJM-TV, Mary, along with her eclectic and hilarious cast of friends and co-workers, confronts some of lifes biggest challenges head-on: career advancement, dating, marriage, death and divorce, all with varying degrees of success, but always with a sense of humor and an optimistic outlook. Season Four of The Mary Tyler Moore Show shows why this endearing and enduring TV classic was the inspiration for a young generation who discovered that they, too, were gonna make it after all. Voted by the Writers Guild of America as the sixth best-written TV series of all time, THE MARY TYLER MOORE SHOW went on to seven hilarious seasons, winning 29 Emmy (R) Awards, producing three spin-off series, and becoming the benchmark for ensemble TV comedy. With a power-house cast including Mary Tyler Moore, Ed Asner, Gavin MacLeod, Ted Knight, Valerie Harper, Cloris Leachman and comic legend Betty White joining the cast as the outrageous Sue-Ann Nivens, this three disc set collects all 24 fourth season episodes.