I remember a Tom Baker (4th Doctor) episode of Doctor Who where he met a Time Lord, possibly an old friend from childhood, who at some point mentioned his real name or at least a nickname. Does anyone know something about this? The episode or the name?
It was a nickname, from his university days.
In The Armageddon Factor, the nick name was: Thete.
DRAX: Hello, Theet. How you been, boy?
DRAX: It is Theet, innit? Theta Sigma? Yeah, 'course it is. Remember me, ay?
I remember that he met a fellow Gallifreyan n in a cave system underneath some city possibly on Gallifrey itself. They used to be in school together and they talked about this though it seemed obvious to me that The Doctor did not particularly like this person. The person he met then called him by his real name. The name was clearly spoken though I can not remember what it was.
I seem to remember that Tom Baker gave him a nasty look then said something quite stern about how he had earned his title "The Doctor" and that is how he should be addressed. I also remember that it seemed to be forbidden to use his real name.
The childhood acquaintance obviously didn't know he had earned the title and it was felt that he had done quite the faux pas in dishonoring by saying his real name out loud.
It made me believe that there was a ranking system and that the Doctor regarded this person as beneath him because he never passed. The title the Doctor, might be a Knight, baron or even a Duke, while his school fellow was only slightly higher than a servant. This fellow obviously felt inferior to the Doctor for the same reason.
And no, I don't know the episode number, I only discovered this page by looking for this same answer.
Note: I was very young when I saw this episode well over 30 years ago(?), so forgive me if my memory of it is incorrect