Doctor Hoop

When Dr Who first reappeared on telly Arthur called it Dr Hoop. Well, whoever heard of someone with a surname like Who? It'd be like that Abbott and Costello sketch: "Who's on First, What's on Second, Idon'tknow's on third".
Oh, who were they watching here.
Sorry, they were watching Who
I don't know. Who they were watching?
Yes!