23 December (releases)


 * 1967 - Episode one of The Enemy of the World was first broadcast on BBC1.
 * 1972 - Part four of Zeron Invasion was first published in TV Action & Countdown.
 * 1978 - Part one of The Power of Kroll was first broadcast on BBC1.
 * 1989 - Nineveh was first published in The Incredible Hulk Presents.