GERTY: I hope life on Earth is everything you remember it to be. Sam: Thanks, Gerty. GERTY: Are you going to be OK? Sam: Of course. GERTY: The new Sam and I will be back to our programming as soon as I have finished rebooting. Sam: Gerty, we're not programs. We're people. Understand?
The last-minute resetting of the harvester coordinates, which ends the satellite blockout: even if Sam 6 didn't make it back, Sam 7 would now have a chance to find out what's going on.