18 December

18 December was notable for a number of highly varied events on Earth and its parallels:
 * 1926 - Agatha Christie was found, ten days after going missing at a hotel in Harrogate, with no memory of what had happened. (TV: The Unicorn and the Wasp)
 * 1953 - The Sky Gypsy, a small private plane bound from Cardiff to Dublin, disappeared. It reappeared in 2007, having travelled through time through the Cardiff Rift. (TV: Out of Time)
 * 1981 - Sarah Jane Smith met Brendan Richards, her aunt Lavinia Smith's ward, for the first time. Shortly afterwards, she opened the crate addressed to her in Lavinia's house in Moreton Harwood and activated K9 Mark III, who had been left in her flat in Croydon by the Fourth Doctor in 1978. (TV: A Girl's Best Friend)
 * 2367 - Walton "Uncle Winkie" Winkle, the creator of Winkle's Wonderland, died of congenital heart disease. He had his body cryogencially frozen in the hope that he could be revived and cured in the future. (AUDIO: Zagreus)