Trying to remember an old sci fi series, I can't think of the name of it the only details I can remember are that humans were on an alien planet and the aliens lived underground and had weapons that were able to petrify anything and that's seriously all I can remember I used to watch it as a kid and it is one of things that has pestered me ever since.

Subterranean aliens

Maybe,.

Earth 2

That looks like it thank you.