- How do we know when they'll get here?
- I'll pick up their approach on my radar, so you can be in position when they land.

6 seconds sound clip from the Radar Men from the Moon - Bridge of Death (S1E3) movie soundboard.

You can hear this line at 00:08:42.460 in the Blu-ray version of the movie.

Quote context

[...]

- Will you have a ray gun completed by the time he lands?

- I'm afraid that is impossible, Your Excellency.

- Then use a bomb or any other weapon available. That ship must be destroyed before anyone could get out of it.

- Yes, Your Excellency

- You heard the orders.

- Yeah, but it might not be that easy.

- There may be guards at the landing field.

- Nevertheless you will carry out instructions.

- I will furnish you with a bomb. You can devise some means for placing it under the ship the moment it lands.

- How do we know when they'll get here?

- I'll pick up their approach on my radar, so you can be in position when they land.

- Just like we figured.

- Yes, we've got to blast them, then plant the bomb before anyone can get out of a ship.

- Here she comes.

- Going in for a landing.

- Calling landing field. Calling landing field.

- Landing field to rocket, come in.

- We're coming down. Is the field clear?

- Yes, sir we're all ready for you.

[...]