21 September (releases)


 * 1968 - Episode two of The Mind Robber was first broadcast on BBC1.
 * 1968 - Part four of TV Comic story Invasion of the Quarks was first published.
 * 1974 - Part five of TV Comic story The Metal-Eaters was first published.
 * 1987 - Part three of Time and the Rani was first broadcast on BBC1.