I think that style of police box is a bit older, as I saw one in a 1930’s British film. Unless it really was the Tardis.
It’s a darn good thing Curzon Dax wasn’t a regular on TNG before DS9. 😉
the first time we saw Dax and got to learn about the character it was after Dax has switched genders. Also we didn’t get Dax switching hosts 12 times over 50 years and never once switching gender.
Dr. Crusher’s male Trill lover, (our introduction to the species on TNG) did switch genders.
Was that a character someone we knew for over 50 years as one gender? Did the character switch hosts 12 times over that 50 years, not once changing gender?
btw, it went into hosts that had different gender, the Trill symbiont itself did not switch gender.