Doctor Who (2013 specials) Doctor Who (2013 specials) The 2013 specials of the British science fiction television programme "Doctor Who" are two additional episodes following the programme's seventh series. In addition to the traditional Christmas episode, which has been a feature of the revived series since 2005, there was also a special celebrating the 50th anniversary of the programme. Both episodes starred Matt Smith as the Eleventh Doctor and Jenna Coleman as Clara Oswald. The 50th anniversary special, "The Day of the Doctor" saw the guest returns of former series leads David Tennant and Billie Piper. The 2013 Christmas special, "The Time of the
One World or None benefit of humanity. In early 1946, rebranded as the Federation of American Scientists, the organization took efforts to broaden and diversify its network of supporters to include all who want to reduce nuclear dangers and ultimately prevent global catastrophe. In 1946, just months after atom bombs were dropped on Hiroshima and Nagasaki, the scientists who had developed nuclear technology came together to express their concerns and thoughts about the nuclear age they had unleashed through the release of a book, "One World or None". The anthology of essays included contributions from Niels Bohr, Albert Einstein, and Robert Oppenheimer, among others.