Season 20

Season 20 of Doctor Who ran between 3rd January 1983 and 25th November 1983. It starred Peter Davison as the Fifth Doctor.

Overview
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. 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.

Stories

 * Arc of Infinity (4 episodes)
 * Snakedance (4 episodes)
 * Mawdryn Undead (4 episodes)
 * Terminus (4 episodes)
 * Enlightenment (4 episodes)
 * The King's Demons (2 episodes)

Anniversary Special

 * The Five Doctors (1 episode)

Regulars

 * The Doctor - Peter Davison
 * Nyssa - Sarah Sutton (Arc of Infinity through Terminus)
 * Tegan Jovanka - Janet Fielding
 * Turlough - Mark Strickson (introduced Mawdryn Undead )

Semi-regulars

 * Kamelion - Gerald Flood (voice) (introduced The King's Demons)
 * The Brigadier - Nicholas Courtney (Mawdryn Undead and The Five Doctors)
 * The Master - Anthony Ainley (The King's Demons and The Five Doctors)

VHS

 * Arc of Infinity
 * Snakedance
 * Mawdryn Undead
 * Terminus
 * Enlightenment
 * The King's Demons/The Five Doctors (extended version)

DVD

 * Arc of Infinity (part of Tegan-Tales in R2)
 * The Five Doctors (extended version)
 * The Five Doctors - 25th Anniversary Edition (origonal version and extended version)

Novelisations

 * Arc of Infinity
 * Snakedance
 * Mawdryn Undead
 * Terminus
 * Enlightenment
 * The King's Demons
 * The Five Doctors