I doubt on any of the 300 Channels you would find anything as offensive (to some) in terms of racism and sexism in mainstream shows as was demonstrated in Saturdays episode.
I loved it, even some of The Black Characters featured and still alive thought there was nothing wrong with it.![]()
As Derek Griffiths, Kenny Lynch and Roy Hudd indicated, you had to be there to understand how programming could be like that in the '70s. The context of the '70s was that the Race Relations Act was introduced in 1965 and the Sexual Offences Act in 1967. Before those were introduced discrimination was not illegal with the exception of physical violence, and even that was tolerated by some of the police who were hardly guardians of universal morals.
So 10 years later, attitudes had not changed much and TV could easily reflect the popular views of certain types in society if it saw them as a potential audience.