As a broadcaster, Al-Khalili is frequently on television and radio and also writes articles for the British press.[26][27] In 2004, he co-presented the Channel 4 documentary The Riddle of Einstein's Brain, produced by Icon Films.[28] His big break as a presenter came in 2007 with Atom, a three-part series on BBC Four about the history of our understanding of the atom and atomic physics.[29] This was followed by a special archive edition of Horizon, "The Big Bang".[30]