Season 21
The Twin Dilemma, the first story with Colin Baker as the Sixth Doctor, aired last in the season. This season saw the departure of companions Tegan, Turlough and Kamelion and introduced Peri. Most episodes were the traditional twenty-five minute length. However, due to coverage of the 1984 Winter Olympics, Resurrection of the Daleks was re-edited before airing and shown as two forty-five minute episodes.
Cast & Crew
Episode Guide
Earth's ocean floor, 2084. With two superpowers poised on the brink of a devastating photonic war, a missile base comes under attack from the reptilian Sea Devils and Silurians, intent on eradicating the upstart human race and reclaiming the planet…
Season 21 FAQs
The cast of Season 21 includes Peter Davison as The Doctor, Nicola Bryant as Perpugilliam "Peri" Brown, Janet Fielding as Tegan Jovanka, and Mark Strickson as Vislor Turlough.
Episodes run about 27 mins. The total runtime is about 10h 42 mins.
Season 21 was released on 05 Jan 1984.
Season 21 has 25 seasons and 24 episodes on Fanbiz. Available seasons include Season 1, Season 2, Season 3, Season 4, Season 5, Season 6, Season 7, Season 8, Season 9, Season 10, Season 11, Season 12, Season 13, Season 14, Season 15, The Key to Time, Season 17, Season 18, Season 19, Season 20, Season 22, The Trial of a Time Lord, Season 24, Season 25, and Season 26.