SIX TV CHARACTERS
WHOSE REAL NAMES ARE UNKNOWN
1] THE DOCTOR - 'Doctor Who'
Note: As we enter the show's fiftieth anniversary year, the answer to the question "Doctor Who?" may finally be answered.
2] THE WAITRESS - 'It's Always Sunny In Philadelphia'
3] 'THE VIRGINIAN'
Note: It's amazing that in all the years the show was on the air, never once did the Virginian's fellow ranch hands call him by name. Sometimes people addressed him simply as "Cowboy".
Note: He was referred to as "Ray", but that was because of his car.
5] AGENT 99 - 'Get Smart'
Note: In the Toobworld Dynamic, her real name is Mandy Stephenson, a character played by Barbara Feldon in 'The Man From U.N.C.L.E.' She used an alias of "Susan Hilton" in one episode of 'Get Smart'. And - again according to my theories in the Toobworld Dynamic, she used the alias of Lauren Hudson when having a once-a-year fling with Sam Malone on 'Cheers'. (By that point she was a United States senator and needed to protect her secret.)
6] NUMBER SIX, 'The Prisoner'
Note: Officially we don't know what his name was, but that was for purely outside-the-box legal reasons. I think we can all agree that he was actually John Drake of 'Danger Man'.
I originally thought I might use Mr. Big in this list, but one of the movie sequels - which have been absorbed into the TV Universe - revealed his name to be John James Preston. Meh. It should have remained a secret if it was going to be that boring.......