"The Metaltron", a Dalek survivor of the Last Great Time War, fell through time and landed on the Ascension Island, located in the British Overseas Territory, near St Helena and Tristan da Cunha in the South Atlantic Ocean sometime in the 1960s; (PROSE: The Time Traveller's Almanac [+]Steve Tribe, BBC Books (2008). Chapter 3, "Everything Changes"; Page 148.) either in 1961 (PROSE: The Secret Lives of Monsters [+]Justin Richards, BBC Books (2014). Chapter 2, "The Daleks"; Page 53.) or 1962. (AUDIO: The Dalek Transaction [+]Matt Fitton, Encounters (UNIT: The New Series, Big Finish Productions, 2017).) It burnt within its crater for three days. (TV: Dalek [+]Robert Shearman, adapted from Jubilee (Robert Shearman), Doctor Who series 1 (BBC One, 2005)., PROSE: The Time Traveller's Almanac [+]Steve Tribe, BBC Books (2008). Chapter 3, "Everything Changes"; Page 148., The Secret Lives of Monsters [+]Justin Richards, BBC Books (2014). Chapter 2, "The Daleks"; Page 53.) Insane and screaming, (TV: Dalek [+]Robert Shearman, adapted from Jubilee (Robert Shearman), Doctor Who series 1 (BBC One, 2005).) the Dalek was recovered by the military (PROSE: The Time Traveller's Almanac [+]Steve Tribe, BBC Books (2008). Chapter 3, "Everything Changes"; Page 148.) before it was passed through several private collections in the 20th and 21st centuries. (TV: Dalek [+]Robert Shearman, adapted from Jubilee (Robert Shearman), Doctor Who series 1 (BBC One, 2005)., PROSE: The Time Traveller's Almanac [+]Steve Tribe, BBC Books (2008). Chapter 3, "Everything Changes"; Page 148.)
The South Atlantic was observed by UNIT radar. (TV: The Claws of Axos)