So their ship must not be allowed to land. Calculate the time of their arrival and have your ray gun set up ready to blast them.
7 seconds sound clip from Radar Men from the Moon - Battle in the Stratosphere (S1E9).
You can hear this line at 00:08:29.824 in the Blu-ray version of the movie.
Quote context
[...]
- It's just like a burial at sea, Joan. Only his body will float around in space forever.
- Good.
- Make a 180 degree turn and head for home.
- Okay!
- Retik calling Krog. Retik calling Krog. Retik calling Krog.
- This is Krog, Your Excellency.
- The rocket ship from Earth has been here again and has escaped with a supply of lunarium.
- That's serious, now they can build their own ray guns and prevent your invasion from the moon.
- This time you must not fail. Your own life and the future of our people are at stake.
- I understand, Your Excellency.
- There we are. We ought to be able to pick up the good ol' Earth on a scanning screen pretty quick.
- Here it comes, right when Krog figured.
- Wait till it turns in for a landing.
- Okay.
[...]