BBC 2 Horizon programme on the multiverse

There was a wonderful episode of Horizon last week on the state of multiverse research. This is the idea that there is more than one universe out there. I was familiar with the quantum idea that when a yes or no decision is made, the universe splits in two to allow both possibilities to exist at the same time. This is an alternative to saying that things remain in a state of quantum uncertainty when you are not looking at them: Scrodinger's Cat is the usual explanation. But the programme also goes into cosmological views on the multiverse. It seems somehow more convincing when there are competing models... Here's the link, valid for a while yet: http://www.bbc.co.uk/iplayer/episode/b0695t56/horizon-20142015-17-which-universe-are-we-in