- From what you've told us, he must've been the leader of the Moon forces here.
- I think so.

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

You can hear this line at 00:03:28.421 in the Blu-ray version of the movie.

Quote context

[...]

- Get those hands higher.

- They're both finished.

- So what do we do now?

- This is Retik, ruler of the Moon. You will carry out Krog's orders.

- Get the men and the trucks necessary to operate my ray guns and bring them here at once!

- And there was enough metal in my flying suit to partially ground the current so I was only knocked out, but the other man was killed instantly.

- From what you've told us, he must've been the leader of the Moon forces here.

- I think so.

- But now that Retik is on Earth, he'll take command. And if Graber and Daly carry out their orders, he'll soon have a strong force of men and ray guns.

- Then we must capture him before he can get organized.

- If he has ray guns there, it won't be easy.

- No, but at least we can get the ray gun in Krog's cave and use it ourselves.

[...]