I don't know how many men or rocket ships he has, but his atomic weapons are so far ahead of anything we have he wouldn't need a very big army.
6 seconds sound clip from the Radar Men from the Moon - Molten Terror (S1E2) movie soundboard.
You can hear this line at 00:03:15.770 in the Blu-ray version of the movie.
Quote context
[...]
- Maybe I have something to say about that.
- So much for the effectiveness of your weapons. Now I will demonstrate one of ours.
- So Retik plans to invade the Earth with his army from the Moon.
- As soon as the saboteur's, he already has their finish softening up our defenses.
- Do you think he'll be able to do it?
- What did you find out about the ray guns?
- Then hadn't we better go back right away and warn our people?
[...]