On the Moon we have an element, Lunarium, which is far superior to uranium as a base for atomic reactions and we can completely control the force of these reactions enabling us to build atomic weapons ranging from huge cannon to these small ray pistols.

— Retik Ruler Of The Moon (Roy Barcroft)

18 seconds sound clip from the Radar Men from the Moon - Moon Rocket (S1E1) movie soundboard.

You can hear this line at 00:17:43.817 in the Blu-ray version of the movie.

Quote context

[...]

- They are merely softening up your defenses for our impending invasion.

- Why do you want to invade the earth?

- Because the atmosphere on the moon has become so thin and dry it is impossible for us to raise food except in pressurized greenhouses.

- And none of us can move outside without helmets.

- So we are planning a mass migration to your world.

- You will find that conquering the earth isn't so simple.

- Ah, but it will be because of our atomic weapons.

- On the Moon we have an element, Lunarium, which is far superior to uranium as a base for atomic reactions and we can completely control the force of these reactions enabling us to build atomic weapons ranging from huge cannon to these small ray pistols.

- It's very considerate of you to give me all this information.

- You deserve some reward for your long journey, but unfortunately I cannot permit you to return to Earth with it.

- Maybe I have something to say about that.

- So much for the effectiveness of your weapons. Now I will demonstrate one of ours.

[...]