If a penny falls off the top of the Empire State Building and hits someone on the pavement, will it kill them? Science geek and adrenaline junkie Greg Foot lives to risk his neck and get to the bottom of such things. Greg comes under sustained attack - he's immersed in cold water to discover what extreme temperature can do to you and has his fingers hammered to test a weird painkiller. And then he investigates spontaneous human combustion. Curiouser and curiouser...

In the first episode of this irreverent, stunt-filled series, Greg suffers to find out what humans taste of, heads to Reading Festival to work out whether the human race could actually shift the planet by jumping at exactly the same time, and finds out whether a bellyflop could kill you. Along the way he is struck by lightning and 'goes to the moon' using helium balloons. It's science - but not as you know it.

In this episode Greg discovers whether there's any truth to the urban legend that you could survive in a falling lift if you jump as it hits the ground. He is prepared to sacrifice his friends in an eye-watering expose of what makes chillies hot and, with the help of a human substitute, he finds out what happens to our bodies when we die. Other secrets shared see Greg fire-walking and trying to survive an asteroid attack, while 70s throwback Professor Logic discovers the shortest route around the world.

Greg meets mixed-martial artist Rosi Sexton to discover if winning unfair fights only happens in the movies, questions why the sky appears to be blue and finds out whether sneezing can cause a person's eyeballs to fall out. Along the way, he explores how to survive on his own bodily fluids.

In the episode Greg finds out how he could become the fastest man on the planet, whether a person can survive being buried alive and why a boomerang comes back to its thrower. He also explores the science behind bulletproof vests, and discovers if water drains anticlockwise out of a sink in Australia.

The last episode sees self-confessed science geek and adrenaline junkie Greg under pressure as he and an inflatable friend attempt to dig to Australia. He will stop at nothing to answer some of life's weirder frequently asked questions and is sucked into quicksand to discover if it is as deadly as the movies make out. He eats a stupefying amount of fast food to see just how quickly you can get fat without really trying and, with the help of a pig, finds out whether it is physically possible to die of a broken heart.