Despite the basis of the show being to rally against stereotypes and promote tolerance, this show hasn't been repeated on British television since the early 1980s due to some of the jokes and secondary characters now being deemed politically incorrect.
Surprisingly the series sold well around the world and was a ratings hit in some West African countries in the late 1970s.
The theme tune was composed by actor/musician (and fifth Doctor Who (1963) ) Peter Davison, and performed by the show's lead Christopher Blake.