27 April (releases)


 * 1968 - Episode one of The Wheel in Space was first broadcast on BBC1.
 * 1974 - Part six of The Monster of Peladon was first broadcast on BBC1.
 * 2010 - Big Finish audio story Slipback was offered as part of a week-long give-away by The Daily Telegraph.
 * 2013 - Journey to the Centre of the TARDIS was first broadcast on BBC One.