Board Thread:Off-topic (OT) Discussion/@comment-4727448-20131220030645/@comment-4727448-20131220035922

Well that's because actors don't want to stay. And if the actors don't want to stay, you don't have a show! So you get someone else to do it! Also, only one of them did one season, the other did a TV movie. Most of the others have done three to six seasons on average.

Because no one knows his real name; people are always asking Doctor Who? so that's the name of the show.