Bang Goes the Theory or Bang is a British television science magazine series, co-produced by the BBC and the Open University, that began on 27 July 2009 and ended on 5 May 2014 on BBC One. Originally presented by Liz Bonnin, Jem Stansfield, Dallas Campbell and Yan Wong, the show employed a hands-on approach to test scientific theory and demonstrate how science shapes our world. From series seven, Maggie Philbin replaced Dallas Campbell as a main presenter and Yan Wong no longer appeared and the programme was subsequently cancelled after just two more seasons.