Music Score

The imdb page for Them! says:

Original Music by
Bronislau Kaper

Not wishing to be rude, but....I'm mystified why you would bother going to the trouble of typing your question on this messageboard and waiting for someone to respond, rather than simply looking it up yourself! Crazy!!

A CD featuring a professionally-done recording of the score is available on the Monstrous Movie Music label. It presents a very generous selection of cues written for this film and others in the genre.

"If you don't know the answer -change the question."