Episode guide - 5th Doctor

Series 19

1. Castrovalva - The freshly regenerated Doctor is in a vulnerable state, and with his regeneration failing, he and his companions go to the city of Castrovalva to let him recover, but a trap waits for them there.
2. Four to Doomsday - The crew arrive on a spaceship which is headed for Earth. On board they meet three Urbankans: Monarch, Persuasion and Enlightenment. What are the aliens' intentions when they reach Earth?
3. Kinda - Deva Loka, is not what it seems. Its inhabitants, the Kinda, are a gentle and seemingly primitive people. But the colonisation team disappearing one by one and Tegan is confronted by the true evil that threatens Deva Loka.
4. The Visitation - The Doctor gets Tegan back to Heathrow. The Problem is that the TARDIS has arrived, over 300 years in the past. The Doctor then realises something is wrong when the Grim Reaper literally stalks the countryside.
5. Black Orchid - The crew arrive in England 1925. At a masked ball at Cranleigh Hall a series of murders begins, and Ann Talbot, is abducted. The Doctor must uncover the secret the Cranleigh family is hiding.
6. Earthshock - The TARDIS drops the crew in the middle of an investigation into the murder of a team of scientists in a complex of caves. Deadly androids are patrolling the tunnels, but what are they protecting... and for whom are they working?
7. Timeflight - Missing Concordes lead the Fifth Doctor on a curious mission back in time where a deadly foe is seeking to seize control of the ancient powers of the Xeraphin.
   

Series 20

1. Arc of Infinity - Shielded by a collapsed star lurks an alien consisting of pure anti-matter. Its intention? To bond with a Time Lord and so cross over into this dimension. The chosen Time Lord is the Doctor.
2. Snakedance - The TARDIS lands on Manussa. But upon learning that it was once home of the Sumaran Empire, the Doctor knows that their arrival has been no accident. A hostile force that is rapidly gaining control of Tegan's will...
3. Mawdryn Undead - A warp ellipse draws the TARDIS off course. The Dcotor's companions are separated from him, and he has to deal with a treacherous schoolboy named Turlough.
4. Terminus - The TARDIS has to make an emergency landing on a space station. It is Terminus, the last stop and receiving point of the ship's cargo of lepers. And as the saying goes, nobody returns from Terminus.
5. Enlightenment - The crew find themselves on an Edwardian sailing ship in deep space participating in a race around the planets. Turlough must finally choose sides, and at the end of the race lies the prize of Enlightenment.
6. The King's Demons - The Doctor, Trgan and Turlough become involved with intrigue at the Court of King John.
7. The Five Doctors - Someone is plucking all the incarnations of the Doctor out of time, and placing them in the Death Zone on Gallifrey where they will play out the deadly Game of Rassilon. But to lose is to win, and he who wins shall lose...
   

Series 21

1. Warriors of the Deep - In 2084, two rivals are locked in a cold war. However, under the sea, old adversaries of the Doctor's awaken, ready to take advantage of the tension and reclaim the planet Earth.
2. The Awakening - The Doctor must face the villagers of Little Hodcombe, who have been influenced by the Malus, and save Tegan before she is burned as the ill-fated Queen of the May.
3. Frontios - The planet Frontios is mankind’s last colony, its inhabitants having fled a dying Earth. However, the planet itself holds hidden dangers.
4. Resurrection of the Daleks - The TARDIS gets dragged to Earth in 1984. But a strike force plans the prison break of the man who created the ultimate evil. The Daleks are back, and they want Davros…
5. Planet of Fire - The Fifth Doctor and Turlough are drawn to the planet Sarn by Kamelion, where they encounter the Master in one of his diabolical plans to tap the power of the Numismaton gas.
6. The Caves of Androzani - On the planet of Androzani Minor, the Doctor & Peri get caught in the dangers of mining spectrox, the most valuable substance in the universe. Things get complicated and deadly when Peri contracts 'spectrox toxaemia', and in the caves of Androzani Minor, the shadowy Sharaz Jek plots a terrible revenge.