Supersized Earth Episode guide
3/3 Dallas Campbell examines what it takes to keep seven billion humans alive.
First broadcast: 05 Dec 2012
2/3 Looking at how we can travel around the planet further and faster than ever before.
First broadcast: 28 Nov 2012
1/3 Dallas explores how we've conquered the skies as we build astonishing places to live.
First broadcast: 21 Nov 2012