I thought you were joking. APPARENTLY NOT.
Star Trek is set in the future (time reference); it also dealt with many stories involving time reversal eg, one in particular when Kirk and Co visited earth in the 1920s - a famous episode with Joan Collins. AGAIN, time travel.
So taking that on board, when I said the show was timeless, that was a PUN, because the show does deal with time. It's not as if I was talking about Coronation Street and said that was timeless. Geddit???
A minor pun but a pun all the same. Hope that clears it up.