3 || |- |Peter Bryant || 1967–1968 || The Evil of the Daleks ep. 4-7, The Abominable Snowmen - The Enemy of the World || |- | Victor Pemberton || 1967 || The Tomb of the Cybermen || Shortest tenure as script editor |- |Derrick Sherwin || 1968 || The Web of Fear – The Mind Robber, The Space Pirates || |- |Terrance Dicks || 1968–1974 || The Invasion – The Seeds of Death, The War Games - Planet of the Spiders || Longest tenure as script editor |- |Robert Holmes || 1974–1977 || Robot – Image of the Fendahl || Had started unofficial work in the post on Death to the Daleks |- |Anthony Read || 1977–1979 || The Sun Makers – The Armageddon Factor|| Started working (uncredited) on Image of the Fendahl, after it was commissioned by Robert Holmes |- |Douglas Adams || 1979–1980 || Destiny of the Daleks – Shada || |- |Christopher H. Bidmead || 1980–1981 || The Leisure Hive – Logopolis || |- |Antony Root || 1981–1982 ||Four to Doomsday, The Visitation and Earthshock || Script editor in name only for Earthshock, due to BBC rules preventing Eric Saward being writer and script editor on the same story |- |Eric Saward || 1982–1986 || Castrovalva, Kinda, Black Orchid, Time-FlightThe Trial of a Time Lord: Mindwarp, The Trial of a Time Lord: The Ultimate Foe ep. 1 || Resigned from post prior to the completion of The Trial of a Time Lord |- |Andrew Cartmel || 1987–1989 || Time and the Rani – Survival || Last script editor for the original series |- |Elwen Rowlands || 2005 || "Rose" – "The End of the World", "Aliens of London" – "World War Three", "The Long Game" – "Father's Day", "Boom Town" || First female script editor, along with Raynor. Both were the first script editors of the new series, hired simultaneously. |- | Helen Raynor || 2005–2008 || "The Unquiet Dead", "Dalek", "The Empty Child" – "The Doctor Dances", "Bad Wolf" – "The Christmas Invasion", "School Reunion" – "The Age of Steel", "Army of Ghosts" – "Doomsday", "Blink", "Silence in the Library" – "Midnight" || See above note. Only script editor with credits in each of the first four series. Only person to script edit for Steven Moffat while he wasn't the head writer. Also Torchwood'''s script editor |- | Simon Winstone || 2006–2007 || "New Earth"