A journey into the dizzying world of cosmic bounces, rips and multiple universes. (R)
The team visit England's most northerly county, Northumberland. (R)
BBC One except Northern Ireland
In Kenya, Click looks at how technology can save lives, and goes elephant tracking.
BBC News Channel
4/6 Neil Oliver visits the Isle of Lewis to seek out the last witness of the Iolaire disaster. (R)
BBC Two Wales only
Guide to the latest gadgets, websites, games and computer industry news.
Saturday 13 October 2012