Engineer Jem tries to smash a land speed record with the help of a single fire extinguisher, a go kart and a well oiled spanner. In an experiment that you really shouldn't try at home, Jem builds himself a go-kart attached to a staggeringly powerful fire extinguisher that uses the laws of physics to fire him along a race track and into the record books.
Liz Bonnin, Dallas Campbell and Jem Stansfield take on more scientific challenges. Engineer Jem becomes a crash test dummy to discover how much g-force his body can take, while scientist Liz gets the Olympic treatment for Sport Relief. Dallas enters the weird world of the atom, and roving reporter Dr Yan Wong dives into a shark tank to explain why there are no long snorkels.
Dallas takes on the latest lie detection technology, while Liz looks at the dilemma that threatened to undermine her hero Charles Darwin. Jem faces his toughest challenge yet, to build a human-powered hydrofoil, and Dr Yan gets on the 3D bandwagon.
Liz Bonnin, Dallas Campbell, Jem Stansfield and Dr Yan Wong take on more experiments and scientific challenges.
Bang goes the Theory puts science to the test once more.
Dallas hits the streets to discover what makes us happy, while Liz travels to Norway to investigate the latest technology to combat climate change. Jem puts himself in harm's way in avalanche country, and Dr Yan sets an optical illusion challenge to a WI meeting.
Jem straps a race horse to his car to explain what horsepower is, Liz sets Dallas a free diving challenge that leaves him gasping for air, Dr Yan shows shoppers how to burn steel, and Dallas goes to CERN to see how a cosmic tea party created everything in the universe.
Liz Bonnin launches a large experiment to learn about the nation's sense of smell, and Dallas Campbell investigates new evidence that life on Earth might have originated in space. Dr Yan Wong hands out free wine to shoppers in Rugby, and on the 25th anniversary of Back to the Future, Jem Stansfield tries to build a car fuelled by junk. Last in the series
