Did you know that there were lyrics actually written for the opening theme song to the original Star Trek series!? You've never heard them becuse they were never recored, but Gene Roddenberry wrote them! According to snopes here's the story behind why Roddenberry wrote the lyrics... it was all about money.
The score was written by Alexander Courage and when the show was picked up he would receive royalties every time the episode aired whether it was a first run or a re-run. This only lasted about a year for him, after that Roddenberry laid claim to half of the royalties for the opening theme song. How? A couple years prior Courage made a handshake agreement with Roddenberry that gave him the option of composing lyrics to the score. Roddenberry eventually exercised that option and wrote lyrics giving him half the rights to the performance royalties even thought they were never recorded. It didn't matter if they were recorded or not, he was entitled to an equal portion of the royalties as long as he wrote them.
Sounds kind of like a dick move to me, Roddenberry said in a previous statement, "Hey, I have to get some money somewhere. I'm sure not going to get it out of the profits of Star Trek." After that, Courage never did any other music for the series. Do you blame him?
So here are those lyrics were written for the show that in my opinion are pretty bad, sing along if you want!
The rim of the star-light
Is wand'ring in star-flight
He'll find in star-clustered reaches
Strange love a star woman teaches.
His journey ends never
His star trek
Will go on forever.
But tell him
While he wanders his starry sea
Remember, remember me