Watch Body Clock: What Makes Us Tick? live on the web
Everyone has an internal biological clock that governs their daily rhythms, including diet, general health and exercise patterns.
But is it possible to manage the body clock better? To find out, former commando Aldo Kane is locked in an abandoned nuclear bunker for 10 days with no way of telling the time.
He is monitored around the clock by evolutionary biologist Ella Al-Shamahi and a team of scientists as he carries out a barrage of tests to uncover exactly what makes the body clock tick.
At the same time, two couples test the latest thinking on how to improve their lives, with general advice on sleeping better and managing their time.
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Previous broadcasts on TV
Broadcasts in 2018
On BBC Two
16/10/2018 at 23:15
On BBC Two
11/10/2018 at 21:00