Forgive me if this is old news for I am not an Irwin Allen expert. But they used this track and others from "Lost in Space" by Johnny Williams for the famed Edward G. Robinson Planet of the Apes <for the 1968 movie> makeup test:
YouTube- DIAMONDS by John Williams Basically the first music ever used for POTA . Wouldn't it be groovy if Williams went full circle and scored "Rise of the Apes"? I know, it'll never happen. Your loved ones would be dead and forgotten for 20 centuries before he'd do it. 20 centuries! But still, now is the time to fantasize before the cold reality of the hack they hire is announced. >SIGH!<
I'll forgive you, Veetus, for mentioning something I've already mentioned.
Did you also know that Charles G. Clark, a veteran Fox cinematographer shot a couple "Lost in Space" episodes and several "Land of the Giants" and was an uncredited DP on PLANET, shooting the interior spaceship stuff that was actually the last stuff to be shot?