This episode explores the foundations of a home, from the cave dwellings of humanity's earliest ancestors, to the immense skyscrapers of modern times.

Now that we've reviewed the fundamentals of shelter - the fascinating past, present, and future of materials - it's time to step over the threshold and find out who is home. These are the rooms that sustain us, entertain us, and define us.

In the final episode, The History of Home will focus on private life by exploring the history of three rooms; The study, the bedroom, and the bathroom.