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Season 16 of Doctor Who, also known under the umbrella title 'The Key to Time', began airing with The Ribos Operation on 2 September 1978 and concluded with The Armageddon Factor on 24 February 1979. It featured Tom Baker as the Fourth Doctor, Mary Tamm as Romana I and John Leeson as K9.

Overview Edit

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Cast Edit

Main Edit

Supporting Edit

Televised Serials Edit

No. in Season Title Writer Number of Episodes Date of Broadcast
#1 The Ribos Operation Robert Holmes 4 02/09/1978 - 23/09/1978
The Doctor is given a mission and a new assistant to seek out the first segment of the Key to Time on the planet Ribos, where a scam operation is in place between the local royals and two alien conmen.
#2 The Pirate Planet Douglas Adams 4 30/09/1978 - 21/10/1978
Detecting the second segment on a far-off world, the Doctor and Romana instead land on a planet ruled over by a pirate captain and miserable citizens, in spite of the planet's abundant riches.
#3 The Stones of Blood David Fisher 4 28/10/1978 - 18/11/1978
The search for the third segment brings the TARDIS to Earth and the time travellers look into a local mystery regarding a strange allignment of stone pillars.
#4 The Androids of Tara David Fisher 4 25/11/1978 - 16/12/1978
Romana is abducted on the planet Tara when she is used to create a robot replica of a princess with a stark resemblance to her.
#5 The Power of Kroll Robert Holmes 4 23/12/1978 - 13/01/1979
Caught in the middle of a turf war between a refinery and inhabitants of a swamp, the Doctor and Romana's search for the fifth segment is interrupted by the emergence of a giant squid.
#6 The Armageddon Factor Bob Baker & Dave Martin 6 20/01/1979 - 24/02/1979
The Doctor, Romana and K9 search for the Key to Time's final segment in the middle of a war between two planets in which a dark, mysterious force is targeting them and threatening to derail their mission.

Stories set before this season Edit

  • To be added

Stories set during this season Edit

  • To be added

Ratings Edit

External Links Edit

Doctor Who Television Stories
First Doctor - William Hartnell
Season 1) An Unearthly Child - The Daleks - The Edge of Destruction - Marco Polo - The Keys of Marinus - The Aztecs - The Sensorites - The Reign of Terror

Season 2) Planet of Giants - The Dalek Invasion of Earth - The Rescue - The Romans - The Web Planet - The Crusade - The Space Museum - The Chase - The Time Meddler

Season 3) Galaxy 4 - Mission to the Unknown - The Myth Makers - The Daleks' Master Plan - The Massacre - The Ark - The Celestial Toymaker - The Gunfighters - The Savages - The War Machines

Season 4) The Smugglers - The Tenth Planet

Second Doctor - Patrick Troughton
Season 4) The Power of the Daleks - The Highlanders - The Underwater Menace - The Moonbase - The Macra Terror - The Faceless Ones - The Evil of the Daleks

Season 5) The Tomb of the Cybermen - The Abominable Snowmen - The Ice Warriors - The Enemy of the World - The Web of Fear - Fury from the Deep - The Wheel in Space

Season 6) The Dominators - The Mind Robber - The Invasion - The Krotons - The Seeds of Death - The Space Pirates - The War Games

Third Doctor - Jon Pertwee
Season 7) Spearhead from Space - Doctor Who and the Silurians - The Ambassadors of Death - Inferno

Season 8) Terror of the Autons - The Mind of Evil - The Claws of Axos - Colony in Space - The Dæmons

Season 9) Day of the Daleks - The Curse of Peladon - The Sea Devils - The Mutants - The Time Monster

Season 10) The Three Doctors - Carnival of Monsters - Frontier in Space - Planet of the Daleks - The Green Death

Season 11) The Time Warrior - Invasion of the Dinosaurs - Death to the Daleks - The Monster of Peladon - Planet of the Spiders

Fourth Doctor - Tom Baker
Season 12) Robot - The Ark of Space - The Sontaran Experiment - Genesis of the Daleks - Revenge of the Cybermen

Season 13) Terror of the Zygons - Planet of Evil - Pyramids of Mars - The Android Invasion - The Brain of Morbius - The Seeds of Doom

Season 14) The Masque of Mandragora - The Hand of Fear - The Deadly Assassin - The Face of Evil - The Robots of Death - The Talons of Weng-Chiang

Season 15) Horror of Fang Rock - The Invisible Enemy - Image of the Fendahl - The Sun Makers - Underworld - The Invasion of Time

Season 16) The Ribos Operation - The Pirate Planet - The Stones of Blood - The Androids of Tara - The Power of Kroll - The Armageddon Factor

Season 17) Destiny of the Daleks - City of Death - The Creature from the Pit - Nightmare of Eden - The Horns of Nimon - Shada (Unfinished)

Season 18) The Leisure Hive - Meglos - Full Circle - State of Decay - Warriors' Gate - The Keeper of Traken - Logopolis

Fifth Doctor - Peter Davison
Season 19) Castrovalva - Four to Doomsday - Kinda - The Visitation - Black Orchid - Earthshock - Time-Flight

Season 20) Arc of Infinity - Snakedance - Mawdryn Undead - Terminus - Enlightenment - The King's Demons

25th Anniversary Special) The Five Doctors

Season 21) Warriors of the Deep - The Awakening - Frontios - Resurrection of the Daleks - Planet of Fire - The Caves of Androzani

Sixth Doctor - Colin Baker
Season 21) The Twin Dilemma

Season 22) Attack of the Cybermen - Vengeance on Varos - The Two Doctors - The Mark of the Rani - Timelash - Revelation of the Daleks

Season 23) The Mysterious Planet - Mindwarp - Terror of the Vervoids - The Ultimate Foe

Seventh Doctor - Sylvester McCoy
Season 24) Time and the Rani - Paradise Towers - Delta and the Bannermen - Dragonfire

Season 25) Remembrance of the Daleks - The Happiness Patrol - Silver Nemesis - The Greatest Show in the Galaxy

Season 26) Battlefield - Ghost Light - The Curse of Fenric - Survival

Eighth Doctor - Paul McGann
Doctor Who
Ninth Doctor - Christopher Eccleston
Series 1) Rose - The End of the World - The Unquiet Dead - Aliens of London - World War Three - Dalek - The Long Game - Father's Day - The Empty Child - The Doctor Dances - Boom Town - Bad Wolf - The Parting of the Ways
Tenth Doctor - David Tennant
Series 2) The Christmas Invasion - New Earth - Tooth and Claw - School Reunion - The Girl in the Fireplace - Rise of the Cybermen - The Age of Steel - The Idiot's Lantern - The Impossible Planet - The Satan Pit - Love and Monsters - Fear Her - Army of Ghosts - Doomsday

Series 3) The Runaway Bride - Smith and Jones - The Shakespeare Code - Gridlock - Daleks in Manhattan - Evolution of the Daleks - The Lazarus Experiment - 42 - Human Nature - The Family of Blood - Blink - Utopia - The Sound of Drums - Last of the Time Lords

Series 4) Voyage of the Damned - Partners in Crime - The Fires of Pompeii - Planet of the Ood - The Sontaran Stratagem - The Poison Sky - The Doctor's Daughter - The Unicorn and the Wasp - Silence in the Library - Forest of the Dead - Midnight - Turn Left - The Stolen Earth - Journey's End

Series 4 Specials) The Next Doctor - Planet of the Dead - The Waters of Mars - The End of Time: Part One - The End of Time: Part Two

Eleventh Doctor - Matt Smith
Series 5) The Eleventh Hour - The Beast Below - Victory of the Daleks - The Time of Angels - Flesh and Stone - The Vampires of Venice - Amy's Choice - The Hungry Earth - Cold Blood - Vincent and the Doctor - The Lodger - The Pandorica Opens - The Big Bang

Series 6) A Christmas Carol - The Impossible Astronaut - Day of the Moon - The Curse of the Black Spot - The Doctor's Wife - The Rebel Flesh - The Almost People - A Good Man Goes to War - Let's Kill Hitler - Night Terrors - The Girl Who Waited - The God Complex - Closing Time - The Wedding of River Song

Series 7) The Doctor, The Widow and the Wardrobe - Asylum of the Daleks - Dinosaurs on a Spaceship - A Town Called Mercy - The Power of Three - The Angels Take Manhattan - The Snowmen - The Bells of Saint John - The Rings of Akhaten - Cold War - Hide - Journey to the Centre of the TARDIS - The Crimson Horror - Nightmare in Silver - The Name of the Doctor

2013 Specials) The Night of the Doctor - The Day of the Doctor - The Time of the Doctor

Twelfth Doctor - Peter Capaldi
Series 8) Deep Breath - Into the Dalek - Robot of Sherwood - Listen - Time Heist - The Caretaker - Kill the Moon - Mummy on the Orient Express - Flatline - In the Forest of the Night - Dark Water - Death in Heaven

Series 9) Last Christmas - The Magician's Apprentice - The Witch's Familiar - Under the Lake - Before the Flood - The Girl Who Died - The Woman Who Lived - The Zygon Invasion - The Zygon Inversion - Sleep No More - Face the Raven - Heaven Sent - Hell Bent - The Husbands of River Song

Series 10) The Return of Doctor Mysterio - The Pilot - Smile - Thin Ice - Knock Knock - Oxygen - Extremis - The Pyramid at the End of the World - The Lie of the Land - Empress of Mars - The Eaters of Light - World Enough and Time - The Doctor Falls - Twice Upon a Time

Thirteenth Doctor - Jodie Whittaker
Series 11) The Woman Who Fell to Earth - The Ghost Monument - Rosa - Arachnids in the UK - The Tsuranga Conundrum - Demons of the Punjab - Kerblam! - The Witchfinders - It Takes You Away - The Battle of Ranskoor Av Kolos - Resolution

Series 12) Episode One - Episode Two - Episode Three - Episode Four - Episode Five - Episode Six - Episode Seven - Episode Eight - Episode Nine - Episode Ten - TBA - TBA - TBA