Freefall in color by many folks.
Gregor: You were a spy.
Sam: I was and am a humble seeker of knowledge. Though I will admit that knowledge people don't want me to have is often the most interesting.
Gregor: What will you do with the knowledge you gain from us?
Sam: I don't know. Getting it home is impractical. My people don't have radio. I'd have to send something physical. That is a problem.
Sam: It's expensive to mail a parcel thirty five light years away, not to mention the difficulty of attaching several billion stamps.