Doctor Who – Série 21
The Twin Dilemma, první příběh s Colin Baker jako šestým Doktorem, se vysílal v poslední sezóně. Tato sezóna viděla odchod společníků Tegan, Turlough a Kamelion a představila Peri. Většina epizod měla tradiční délku dvaceti pěti minut.
| Epizoda | Název | Délka |
|---|---|---|
| S21E01 | Warriors of the Deep: Part 1 | 25 min |
| S21E02 | Warriors of the Deep: Part 2 | 24 min |
| S21E03 | Warriors of the Deep: Part 3 | 24 min |
| S21E04 | Warriors of the Deep: Part 4 | 24 min |
| S21E05 | The Awakening: Part 1 | 25 min |
| S21E06 | The Awakening: Part 2 | 25 min |
| S21E07 | Frontios: Part 1 | 25 min |
| S21E08 | Frontios: Part 2 | 25 min |
| S21E09 | Frontios: Part 3 | 24 min |
| S21E10 | Frontios: Part 4 | 24 min |
| S21E11 | Resurrection of the Daleks: Part 1 | 46 min |
| S21E12 | Resurrection of the Daleks: Part 2 | 47 min |
| S21E13 | Planet of Fire: Part 1 | 24 min |
| S21E14 | Planet of Fire: Part 2 | 24 min |
| S21E15 | Planet of Fire: Part 3 | 24 min |
| S21E16 | Planet of Fire: Part 4 | 25 min |
| S21E17 | The Caves of Androzani: Part 1 | 25 min |
| S21E18 | The Caves of Androzani: Part 2 | 25 min |
| S21E19 | The Caves of Androzani: Part 3 | 25 min |
| S21E20 | The Caves of Androzani: Part 4 | 26 min |
| S21E21 | The Twin Dilemma: Part 1 | 25 min |
| S21E22 | The Twin Dilemma: Part 2 | 25 min |
| S21E23 | The Twin Dilemma: Part 3 | 24 min |
| S21E24 | The Twin Dilemma: Part 4 | 25 min |