With their own brand of inimitable science, Liz Bonnin, Dallas Campbell and Jem Stansfield tackle the science questions that you've always wanted answered.
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.
Bang Goes the Theory is co-produced with The Open University. For more ways to put science to the test, go to www.bbc.co.uk/bang and follow the links to The Open University.