Enterprise2001

Captain Jonathan Archer:
Where do you come from?

Alien in Tucker's body:
We live in subspace. We travel through it. We're explorers, like you.

Captain Jonathan Archer:
Why did you take Commander Tucker?

Alien in Tucker's body:
It's been a long time since we've encountered corporeal beings. After we performed the first crossing with your Commander, we realized we were compatible. You're very interesting - trapped in bodies that need maintenance... You have gender. You require mates to reproduce. You eat... food! We were like you once. But we evolved. Now we can learn how our ancestors lived.