from Wikipedia:
An American Family was a documentary shot in 1971 and first aired in the United States on PBS in early 1973. The show was twelve episodes long, edited down from about 300 hours of footage, and chronicled the experiences of a nuclear family, the Loud family of Santa Barbara, California, during a period of time when parents Bill and Pat Loud separated and Pat filed for divorce.
The parents had five children. One of them, Lance Loud, was a gay 20-year-old man who occasionally wore lipstick and women's clothes and took his mother to a drag show in the second episode of the series. Scholars sometimes mention that Lance came out of the closet on TV, but this is technically incorrect—he was simply gay without announcement or drama; his family says that they had known for quite a while. As such, Lance was the first openly gay character on television and has become something of a gay icon.
Most notable was when Pat Loud asked her husband for a divorce and to leave the house on camera. Pat famously saying to her husband "you know there's a problem" and Bill Loud responding "What's your problem?". The moment was later chosen as one of the Top 100 Television Moments by TV Guide.
On airing, the show drew over 10 million viewers—phenomenal viewership for PBS standards in 1973 or even today—and drew considerable controversy. The series was widely discussed in the media in 1973, and the Loud family appeared on the cover of the March 12, 1973 issue of Newsweek magazine.
The series was parodied in 1979 movie Real Life, in which a narcisstic filmmaker disrupts the filming of such a television series, instituting changes that he says are "good for the series". An American Family was featured in a 2002 television special, in which TV Guide named it one of the best 50 shows of all time.