They can't really want to harm us. If they did, they could've destroyed us a long time ago. They must have another reason for keeping us here.
9 seconds sound clip from the The Angry Red Planet movie soundboard.
You can hear this line at 00:58:41 in the Blu-ray version of the movie.
Quote context
[...]
- The control. Whoever they are, they don't want us to leave.
- Why don't they come out in the open, whoever they are?
- This waiting, uncertainty, not knowing...
- Why are they keeping us here? What do they want with us? What are we? Guinea pigs?
- Take it easy, Irish, easy. Now, think a minute.
- I wonder. will we ever get back to Earth again?
- Sam, break out the boat. We'll see what's across that lake.
[...]