The Doctor Who Production Diary: December 23rd

1967 Debut broadcast of The Enemy Of The World episode one on BBC1 The Enemy Of The World
1967 Recording for The Enemy Of The World takes place at Lime Grove Studio D; Frazer Hines and Deborah Watling are absent while on holiday The Enemy Of The World
1968 Terrance Dicks and Malcolm Hulke are commissioned to write The War Games The War Games
1968 Filming for The Seeds Of Death takes place at the Ealing Television Film Studios The Seeds Of Death
1978 Debut broadcast of The Power Of Kroll episode one on BBC1 The Power Of Kroll
1980 Terence Dudley is commissioned to write Four To Doomsday Four To Doomsday