What happened to the others?...

In this week's readings and in professor Decker's lecture, we see that there is an obvious shift in the Media as new TV genres emerge. Professor Decker showed us several clips which depicted the characters of the shows. Yet, something that I noticed was that the characters/actors of these famous shows were all white. Is this a coincidence? Or was there still a racial barrier? How do you think people of color as well as other cultures were portrayed by television shows? Do you think they played the stereotypical roles of their race? If you can, give examples of specific shows you may know of.