Genesis

Ed and Eva are separated in an accident that destroys their ship. Ed wakes on a beach and does not know who he is, where he is, or where he came from. They meet up later, after they each had a chance to explore this new world.
They agree that they must reach their other teams who are supposed to be populating the other continents. Afterwards, they journey to the north, trying to learn about the 'people' and animals that inhabit the place.
The journey lasts long enough for them to grow old together, have a child of their own and forge friendships with the cultures they meet.