High Anxieties: The Mathematics of Chaos

BBC Four, 8pm

From the First World War to today's acute economic and environmental crises, mathematicians have repeatedly cautioned that the world is not controllable, but dominated by chaos. This documentary should paint a fascinating picture of how number crunchers have foreseen catastrophe - and been ignored.

Last Man Standing

BBC Three, 9pm

Tribe meets The Ultimate Fighter in this returning series as another six Western beefcakes compete against tribal champions in some of the world's most dangerous combat sports. This first episode gives a surprisingly endearing account of the athletic adventurers' attempts to learn Suri stick-fighting in Ethiopia.

True Stories: Garbage Warrior

More4, 10pm

Michael Reynolds is a different kind of architect, who believes that his rubbish buildings could save the planet. He has been designing self-sufficient, off-the-grid houses in New Mexico for more than 30 years. He uses beer cans, bottles and tyres for bricks; captures solar energy for power and rain water for other basic needs. He hasn't paid a utility bill for decades. Oliver Hodge's documentary starts as a romantic celebration of a charismatic visionary, switches gears when the bureaucrats come down hard, then pulls back for a bracing glimpse of the big picture. “I'm tryin' to save my ass - and that's a powerful force,” Reynolds says. You better believe it. Tom Charity

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