I wonder if it was just the willis character that was going to be on this show and not arnold could Diff'rent Strokes stayed on the air for 8 years if all the episodes revolved around one black person willis jackson ?

http://www.youtube.com/watch?v=RxVfiYYo0Nw
http://www.youtube.com/watch?v=0KflQ5--uSY
http://www.youtube.com/watch?v=RGJRkTIZAmQ