Captain, just suppose, suppose there were Martians, and they saw us land, and suppose they thought of us as invaders.

12 seconds sound clip from the X Minus 1 - Mars is Heaven by Ray Bradbury classic radio dramaseries.

You can hear this line at 00:21:58 in the radio play.

Quote context

[...]

- Captain Black, you asleep?

- No, no, I've been thinking about what we were expecting. Green skin Martians, when all the time it was only Mom and Dad and Edward waiting.

- It's funny what tricks your imagination can play on you.

- Well, I guess Mars is Heaven.

- You know, I've been thinking about Martians, too.

- Captain, just suppose, suppose there were Martians, and they saw us land, and suppose they thought of us as invaders.

- What would be the best weapon they could use against our atom bombs, huh?

- I don't see what you're getting at?

- They would want to disarm us first, huh? To wipe out all suspicion, and make us feel at home.

- Suppose this house isn't real. Suppose the people are just images. Stolen from our own memories by Martians. Created for us by telepathy, hypnotism.

[...]