
Season 20 of Doctor Who ran between 3rd January 1983 and 25th November 1983. It starred Peter Davison as the Fifth Doctor.
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The season consisted of six serials and 22 episodes of twenty-five minutes each, plus a ninety minute 20th anniversary special, The Five Doctors broadcast as part of Children in Need. This season sees the departure of companion Nyssa and introduced Turlough. Every story of this season contained an old enemy of the Doctor in an least a minor role, as part of the 20th anniversary of the show.
| # | Title | Writer | Episodes | Notes |
| 1 | Arc of Infinity | Johnny Byrne | 4 | |
| 2 | Snakedance | Christopher Bailey | 4 | |
| 3 | Mawdryn Undead | Peter Grimwade | 4 | First appearance of Vislor Turlough; reintroduction of Brigadier Lethbridge-Stewart |
| 4 | Terminus | Steve Gallagher | 4 | Final appearance of Nyssa |
| 5 | Enlightenment | Barbara Clegg | 4 | Final appearance of the Black Guardian |
| 6 | The King's Demons | Terence Dudley | 2 | First appearance of Kamelion |
| # | Title | Writer | Episodes | Notes |
| 7 | The Five Doctors | Terrance Dicks | 1 90-minute special | Final appearances of the First, Third and Fourth Doctors; reintroductions of the First, Second, Third and Fourth Doctors, Romana, Susan Foreman and Sarah Jane Smith. First Doctor Who appearances of K-9 Mk. III and Rassilon |
| Doctor Who by season/series |
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| Classic Series: 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 • 26 |
| 1996 movie |
| New Series: 1 • 2 • 3 • 4 • 2009 Specials • 5 |
| Season 20 |
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| Arc of Infinity • Snakedance • Mawdryn Undead • Terminus • Enlightenment • The King's Demons 20th Anniversary Special: The Five Doctors |
| Aliens and Enemies of Season 20 |
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| Arc of Infinity: Omega • Hedin • The Ergon • Time Lords Snakedance: The Mara • Manussans Mawdryn Undead: Black Guardian • Mawdryn Terminus: Vanir • Lazars • The Garm • Black Guardian Enlightenment: Eternals • Wrack • Mansell • Black Guardian • White Guardian The King's Demons: The Master • Kamelion The Five Doctors: Borusa • Cybermen • Cyber-Leader • Cyber-Lieutenant • Robot Yeti • Raston Warrior Robot • Dalek • Kaled mutant • Time Lords |
Sesame Street Season 20 aired from November 21, 1988 to May 19, 1989.
Episodes 2486 - 2615 (130 episodes)
Muppet Characters
Human Characters
| Previous season: | Next season: |
| Season 19 (1987-1988) | Season 21 (1989-1990) |
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