TWELFTH SEASON 4A. Robot 1. Part One 28 Dec 74 2. Part Two 4 Jan 75 3. Part Three 11 Jan 75 4. Part Four 18 Jan 75 4C. The Ark in Space 1. Part One 25 Jan 75 2. Part Two 1 Feb 75 3. Part Three 8 Feb 75 4. Part Four 15 Feb 75 4B. The Sontaran Experiment 1. Part One 22 Feb 75 2. Part Two 1 Mar 75 4E. Genesis of the Daleks 1. Part One 8 Mar 75 2. Part Two 15 Mar 75 3. Part Three 22 Mar 75 4. Part Four 29 Mar 75 5. Part Five 5 Apr 75 6. Part Six 12 Apr 75 4D. Revenge of the Cybermen 1. Part One 19 Apr 75 2. Part Two 26 Apr 75 3. Part Three 3 Apr 75 4. Part Four 10 Apr 75 THIRTEENTH SEASON 4F. Terror of the Zygons 1. Part One 30 Aug 75 2. Part Two 6 Sep 75 3. Part Three 13 Sep 75 4. Part Four 20 Sep 75 4H. Planet of Evil 1. Part One 27 Sep 75 2. Part Two 4 Oct 75 3. Part Three 11 Oct 75 4. Part Four 18 Oct 75 4G. Pyramids of Mars 1. Part One 25 Oct 75 2. Part Two 1 Nov 75 3. Part Three 8 Nov 75 4. Part Four 15 Nov 75 4J. The Android Invasion 1. Part One 22 Nov 75 2. Part Two 29 Nov 75 3. Part Three 6 Dec 75 4. Part Four 13 Dec 75 4K. The Brain of Morbius 1. Part One 3 Jan 76 2. Part Two 10 Jan 76 3. Part Three 17 Jan 76 4. Part Four 24 Jan 76 4K. The Seeds of Doom 1. Part One 31 Jan 76 2. Part Two 7 Feb 76 3. Part Three 14 Feb 76 4. Part Four 21 Feb 76 5. Part Five 28 Feb 76 6. Part Six 6 Mar 76 FOURTEENTH SEASON 4M. The Masque of Mandragora 1. Part One 4 Sep 76 2. Part Two 11 Sep 76 3. Part Three 18 Sep 76 4. Part Four 25 Sep 76 4N. The Hand of Fear 1. Part One 2 Oct 76 2. Part Two 9 Oct 76 3. Part Three 16 Oct 76 4. Part Four 23 Oct 76 4P. The Deadly Assassin 1. Part One 30 Oct 76 2. Part Two 6 Nov 76 3. Part Three 13 Nov 76 4. Part Four 20 Nov 76 4Q. The Face of Evil 1. Part One 1 Jan 77 2. Part Two 8 Jan 77 3. Part Three 15 Jan 77 4. Part Four 22 Jan 77 4R. The Robots of Death 1. Part One 29 Jan 77 2. Part Two 5 Feb 77 3. Part Three 12 Feb 77 4. Part Four 19 Feb 77 4S. The Talons of Weng-Chiang 1. Part One 26 Feb 77 2. Part Two 5 Mar 77 3. Part Three 12 Mar 77 4. Part Four 19 Mar 77 5. Part Five 26 Mar 77 6. Part Six 2 Apr 77 FIFTEENTH SEASON 4V. Horror of Fang Rock 1. Part One 3 Sep 77 2. Part Two 10 Sep 77 3. Part Three 17 Sep 77 4. Part Four 24 Sep 77 4T. The Invisible Enemy 1. Part One 1 Oct 77 2. Part Two 8 Oct 77 3. Part Three 15 Oct 77 4. Part Four 22 Oct 77 4X. Image of the Fendahl 1. Part One 29 Oct 77 2. Part Two 5 Nov 77 3. Part Three 12 Nov 77 4. Part Four 19 Nov 77 4W. The Sunmakers 1. Part One 26 Nov 77 2. Part Two 3 Dec 77 3. Part Three 10 Dec 77 4. Part Four 17 Dec 77 4Y. Underworld 1. Part One 7 Jan 78 2. Part Two 14 Jan 78 3. Part Three 21 Jan 78 4. Part Four 28 Jan 78 4Z. The Invasion of Time 1. Part One 4 Feb 78 2. Part Two 11 Feb 78 3. Part Three 18 Feb 78 4. Part Four 25 Feb 78 5. Part Five 4 Mar 78 6. Part Six 11 Mar 78 SIXTEENTH SEASON (The Key to Time) 5A. The Ribos Operation 1. Part One 2 Sep 78 2. Part Two 9 Sep 78 3. Part Three 16 Sep 78 4. Part Four 23 Sep 78 5B. The Pirate Planet 1. Part One 30 Sep 78 2. Part Two 7 Oct 78 3. Part Three 14 Oct 78 4. Part Four 21 Oct 78 5C. The Stones of Blood 1. Part One 28 Oct 78 2. Part Two 4 Nov 78 3. Part Three 11 Nov 78 4. Part Four 18 Nov 78 5D. The Androids of Tara 1. Part One 25 Nov 78 2. Part Two 2 Dec 78 3. Part Three 9 Dec 78 4. Part Four 16 Dec 78 5E. The Power of Kroll 1. Part One 23 Dec 78 2. Part Two 30 Dec 78 3. Part Three 6 Jan 79 4. Part Four 13 Jan 79 5F. The Armageddon Factor 1. Part One 20 Jan 79 2. Part Two 27 Jan 79 3. Part Three 3 Feb 79 4. Part Four 10 Feb 79 5. Part Five 17 Feb 79 6. Part Six 24 Feb 79 SEVENTEENTH SEASON 5J. Destiny of the Daleks 1. Episode One 1 Sep 79 2. Episode Two 8 Sep 79 3. Episode Three 15 Sep 79 4. Episode Four 22 Sep 79 5H. City of Death 1. Part One 29 Sep 79 2. Part Two 6 Oct 79 3. Part Three 13 Oct 79 4. Part Four 20 Oct 79 5G. The Creature From the Pit 1. Part One 27 Oct 79 2. Part Two 3 Nov 79 3. Part Three 10 Nov 79 4. Part Four 17 Nov 79 5K. Nightmare of Eden 1. Part One 24 Nov 79 2. Part Two 1 Dec 79 3. Part Three 8 Dec 79 4. Part Four 15 Dec 79 5L. The Horns of Nimon 1. Part One 22 Dec 79 2. Part Two 29 Dec 79 3. Part Three 5 Jan 80 4. Part Four 12 Jan 80 EIGHTEENTH SEASON 5N. The Leisure Hive 1. Part One 30 Aug 80 2. Part Two 6 Sep 80 3. Part Three 13 Sep 80 4. Part Four 20 Sep 80 5Q. Meglos 1. Part One 27 Sep 80 2. Part Two 4 Oct 80 3. Part Three 11 Oct 80 4. Part Four 18 Oct 80 5R. Full Circle 1. Part One 25 Oct 80 2. Part Two 1 Nov 80 3. Part Three 8 Nov 80 4. Part Four 15 Nov 80 5P. State of Decay 1. Part One 22 Nov 80 2. Part Two 29 Nov 80 3. Part Three 6 Dec 80 4. Part Four 13 Dec 80 5S. Warrior's Gate 1. Part One 3 Jan 81 2. Part Two 10 Jan 81 3. Part Three 17 Jan 81 4. Part Four 24 Jan 81 5T. The Keeper of Traken 1. Part One 31 Jan 81 2. Part Two 7 Feb 81 3. Part Three 14 Feb 81 4. Part Four 21 Feb 81 5V. Logopolis 1. Part One 28 Feb 81 2. Part Two 6 Mar 81 3. Part Three 13 Mar 81 4. Part Four 20 Mar 81