Now that Retik's dead, we feel sure there's no immediate danger of any enemy invasion from the moon. And we'll have time to build an adequate defense.

8 seconds sound clip from Radar Men from the Moon - Death of the Moon Man (S1E12).

You can hear this line at 00:11:56.525 in the Blu-ray version of the movie.

Quote context

[...]

- Should be here by now. Go out to the mine entrance and see if there's any sign of them.

- Yes sir.

- Let's take a look inside.

- You take that tunnel, I'll take this one!

- He's getting away in his rocket! Let's get to the truck!

- Get the gun ready, quick!

- Now that Retik's dead, we feel sure there's no immediate danger of any enemy invasion from the moon. And we'll have time to build an adequate defense.

- Will you want us to make another trip to the moon to see what's going on?

- I don't think so.

- Now that the moon men's attack has failed. We can make the whole story public and the military authorities can take charge.

- But we will need more of your rocket ships, Commando, so I suggest you make plans for going into their manufacture on a large scale.

- Before we get started on ships using regular rocket fuel, let's do some experimenting with atomic power from lunarium.

[...]