Teacher Jane Hampden is increasingly frustrated by the war games being played around the village, but the Doctor is more alarmed to find a boy transported from the 17th century…
The Malus's influence is asserting itself all over the village and the games take a deadly turn. The Doctor and his friends rush back to the TARDIS, but what will they find within?
Captain Revere is the latest victim to be sucked beneath the surface of Frontios, leaving the young Plantagenet to run the colony. The TARDIS has also been 'destroyed'...
Trying to discover why Frontios is being attacked from both above and below, the Doctor faces the malevolent Tractators while revolution brews in the colony...
Turlough's race memories of the Frontios threaten to overwhelm him as the Doctor finally convinces Brazen that the threat from underground is very real...
The Doctor manipulates the Gravis into restoring the TARDIS. But he must find a way to break the Tractators' hold over Frontios before they wipe out all life on the surface.
Davros has been kept in suspended animation aboard a prison space station but now the Daleks have come to collect him, aided by Lytton and his fake 'policemen'.
As survivors of the prison station fight the invaders, Dalek agents on Earth take steps to protect the time corridor being used by the Doctor's friends. And Tegan says goodbye…
On the planet Sarn, the truth about the god Logar is being sought, while on Earth, Peri wants a break from her stepfather. But the Master has other plans for everyone...
Kamelion has taken the TARDIS to Sarn and is trying to locate his master, while the Doctor explores the mystery of the Misos Triangle - much to Turlough's consternation…
Logar is angry and the volcano shakes with his displeasure – according to Timanov, who demands sacrifices to appease his god. Peri discovers the Master's whereabouts...
The Doctor is forced to take drastic measures against Kamelion and the Master to stop Sarn being completely destroyed by the numismaton gas that has been released...
Gunrunners on Androzani Minor are supplying the unhinged android-builder, Sharez Jek, with munitions to help his plot to return to power. But not everyone is happy about that…
Military captive Salateen tells Peri and the Doctor they are dying from spectrox toxaemia. The only cure is the milk of the queen bat who sleeps deep below the caverns.
As Morgus continues to plot his political future on Androzani Major, Sharez Jek insanely believes Peri will fall in love with him. The Doctor is caught by the gunrunners...
Morgus is ruined and Jek goes on a murderous rampage. Back in the TARDIS, the 'dying' Doctor manages to cure Peri's spectrox toxaemia and then regenerates...
The mysterious Professor Edgeworth has kidnapped twin human child genii, Romulus and Remus, and Hugo Lang holds the new Doctor responsible for the destruction of his spaceship.
On Jaconda, Mestor's cruel domination over the planet's population continues while on Titan Three, the Doctor seems to have been blown up in a booby-trapped building...
Mestor claims that all he wants is the Sylvest twins to help him repopulate his home planet. But the Doctor knows there's more to this than meets the eye...
Mestor's true plan is revealed and the Doctor's old Gallifreyan friend Azmael comes to the realisation that he has been corrupted long enough by the Gastropod leader...