Agnes' first name was revealed in the seventh season episode "Bart the Fink". Before that, the character was known as "Mrs. Skinner". In the beginning of the series, the writers made several references to Agnes and Seymour's unhealthily close relationship as similar to that of Norman Bates and his mother. In "Boy Meets Curl", it is revealed that Agnes' resentment towards Seymour may have begun even before her son was born—during the 1952 Summer Olympics in Helsinki, Agnes competed in the pole vaulting event while nine months pregnant. When Seymour makes his first kick, he hits the bar, thus making Agnes lose and subsequently crushing her dreams. However, this would contradict the earlier episode when it is revealed that Seymour is not her birth son. In "Grade School Confidential", it is revealed that Agnes enjoys collecting pictures of cakes that she cuts out of magazines, a hobby she began in 1941. She does not like to eat them, however. In the 26th-season episode "Sky Police" she mentions that she has a brother named Stevie.