On the sitcom The Simpsons, she worked as a script supervisor and provided the voice of Lunchlady Doris and other minor characters.

[1][2] Grau supervised the script of the 1967 crime film Point Blank, which revolves around a man named Walker (played by Lee Marvin) who sets out to find his friend who betrayed him during a robbery that they performed together and left with all the money for himself.

[4] She then supervised the scripts of the films The Champ (1979), The Frisco Kid (1979), The Hunter (1980), The Pursuit of D. B. Cooper (1981), Caveman (1981), Clue (1985), Marie (1985), and No Way Out (1987).

[5] Between 1986 and 1987, she played the character Corinne in a few episodes of the sitcom Cheers,[1] a show on which she had previously worked as script supervisor during seasons one and four.

[11] According to Philip Wuntch, film critic for The Dallas Morning News, Grau "has only a few lines as a senior citizen with old-time political savvy, but she makes every vocal inflection count.

However, the character returned to the show after a decade-long absence in 2006 (voiced by Tress MacNeille and renamed Lunchlady Dora.