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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?

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See also scifi.stackexchange.com/questions/3637/…, where "Thete", or "Theta Sigma" is mentioned, and tardis.wikia.com/wiki/Aliases_of_the_Doctor where there is a lot of detail about the Doctor's names. –  Tony Meyer Oct 7 '11 at 9:54

1 Answer 1

up vote 11 down vote accepted

It was a nick name, from his university days.

In The Armageddon Factor.

The nick name was: Thete.

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