Season 20 (23 episodes) - Random episode
Episode 1 Arc of Infinity, Part One03/01/1983
Episode 2 Arc of Infinity, Part Two05/01/1983
Episode 3 Arc of Infinity, Part Three11/01/1983
Episode 4 Arc of Infinity, Part Four12/01/1983
Episode 5 Snakedance, Part One18/01/1983
Episode 6 Snakedance, Part Two19/01/1983
Episode 7 Snakedance, Part Three25/01/1983
Episode 8 Snakedance, Part Four26/01/1983
Episode 9 Mawdryn Undead, Part One01/02/1983
Episode 10 Mawdryn Undead, Part Two02/02/1983
Episode 11 Mawdryn Undead, Part Three08/02/1983
Episode 12 Mawdryn Undead, Part Four09/02/1983
Episode 13 Terminus, Part One15/02/1983
Episode 14 Terminus, Part Two16/02/1983
Episode 15 Terminus, Part Three22/02/1983
Episode 16 Terminus, Part Four23/02/1983
Episode 17 Enlightenment, Part One01/03/1983
Episode 18 Enlightenment, Part Two02/03/1983
Episode 19 Enlightenment, Part Three08/03/1983
Episode 20 Enlightenment, Part Four09/03/1983
Episode 21 The Kings Demons, Part One15/03/1983
Episode 22 The Kings Demons, Part Two16/03/1983
Episode 23 Five Doctors25/11/1983