Doctor Who? running joke

For over 45 years the Doctor Who franchise has been going strong and even though it's called "Doctor Who", that is not the name of the main character. It is generally considered taboo by the fans to call the Doctor, Doctor Who. However during the 45 years of the franchise there has been many jokes about people asking The Doctor's name by asking "Doctor Who?"

In television

 * In The Gunfighters, The First Doctor introduced himself to Masterson as an alias he made up then and there, and there for mumbled a lot. A rightfully confused Masterson asked "Doctor Who?" and The Doctor answered "yes, er, quite right"
 * In The War Machines, WOTAN ordered Dodo Chaplet to send The First Doctor to her, by saying "DDDOCTORR WHOO ISS RREQUIREDD". This is the only time in the franchise run The Doctor was ever called Doctor Who, and it caused outrage amongst fans.
 * In The Curse of Peladon, Queen Victoria was outraged that the guards wouldn't let her in the palace, because she was the rightful representor of Earth, The Third Doctor claimed to be the representor of Earth and one of the guards pointed that out. Queen Victoria asked "Doctor? What Doctor? Doctor who?"

In pop-culture
Several shows have had characters named Dr. Who (usually spelt Hoo as the Dr. is an Asian) as a special pop-culture reference to the show