Landing in New Romford, The Doctor and Peri soon find themselves arrested as members of an Underground movement after Peri is suddenly handled a device able to shut the biological computer of the planet -- the General Will -- by a hunted underground representative. The Doctor realises the colony is under the control the the All virus, the remnant of a once flourishing civilization who launches spores with their knowledge into space when they learned they were doomed. Instead of helping other cultures to flourish, the spores mutated into a true viral form that takes over sentient planets, acting as parasites to grow and mature until they can be ejected again into space to colonize other worlds. The Doctor is able to put the All computer to sleep and store its brain into a portable vacuum chamber, freeing the colony. When Peri ask him why he wants to keep the vaccuum chamber in the TARDIS rather than simply dumping it, he simply says he felt responsible. He was the one who told the All of a way to evade their fate.

Time-Placement: After Vengeance on Varos since Peri refers to that particular adventure. Otherwise arbitrary.

There has been already three murders at Lunarversity, and each time Kadiatu Lethbridge-Stewart had a dream. A vivid, realistic dream of a strange man hated by his robotic sisters. There was a fourth murder, but she didn't had a dream. She's spending the evening at a nightclub with her friends Clive and Vic when she senses an alien presence around her. An alien murderer. She chases it through the night with Clive. They confront it and destroy it. Returning to the nightclub, they learn of a fifth murder, commited in front of everybody. The killer was not the alien creature, but their friend Vic. A sad Kadiatu doesn't remember her final dream. But it was a tale of rebirth and hope.

Venus, 357 years in the future. The planet has been terraformed all this time by Mark Tajore, now more robot than man, to build a new society where men and women live by their traditionnal roles. He's going to walk freely for the first time on the bare soil when he's hailed by the Third Doctor and Sarah Jane Smith. They've brought him his long-lost sister Violet, who died centuries ago during a coming-to-age ritual ceremony in East Africa. In fact, she was rescued by a revolted Sarah during her ordeal, and the Doctor used her to make a statement to the mysogenic Tajore. Violet asks to return home despite everything, where she became a simple pearl diver. And Mark Tajore dies understanding that the thinly-preserved culture of male dominance he dreamed for could not populate a new planet.

Time-Placement: Between The Time Warrior and Planet of the Spiders, probably later than sooner as Sarah seems to see through the Doctor's schemes and feel at ease opposing him.

Arriving to UNIT headquarters to tell the Brigadier about the Master's escape from his island prison, The Doctor and Jo find the whole place besieged by reporters wanting to know the truth about UNIT. They quickly comes with the idea of presenting the covert operation to the press as a science-fiction TV show -- the adventures of a Time Lord travelling through time and space in a police box...

Time-Placement: Immediately after The Sea Devils.

While browsing the TARDIS library, Sam discovers a book on Martian history written by Professor Bernice Summerfield. Fascinated by the picture of a painting in the book, she asks the Doctor to visit Mars. She then decides to go to the battlefield represented in the painting. Suddenly, she find itself fighting at the battle, along a dark haired version of herself urging her to remember them... When she regain conscience, the Doctor tells her the transit train she was in derailled and she was out for days. Deeply traumatised by her experiences, which the Doctor says are only hallucinations, she make a painting of what she saw, which end being the painting that was in the book. Wondering if she really dreamed all this, Sam finds some Martian sand and a pebble in her pocket.

Time-Placement: The dark-haired version of Sam was first mentioned in Alien Bodies. Sam's youthful behaviour implies that this takes place before her separation from the Doctor in Longest Day.

The First Doctor muses on his fears about his coming but unavoidable regeneration, even expressing the wish to die as a human.

Time-Placement: The Doctor is at the very end of his first incarnation, thus likely in the gap allowed by Rassilon in The Five Doctors, just before The Tenth Planet.

The TARDIS lands on Cassius, a barren planet at the edge of the solar system, and the Doctor decides to go exploring, to the displeasure of Jamie and Zoe. They soon discover a large building occupied by two Lancheeni, Doplhe and Mumil, supposely on holiday. The suspicious travellers soon discover that they are in fact spying Earth, and selling information to a certain Megriarch. Confronting the two aliens about their plan for an invasion of Earth, the Doctor and his companions leave promising to warn the authorities about their plan. In fact, the Lancheeni were only recording TV broadcasts from Earth.

Time-Placement: Between The Wheel in Space and The War Games, but later rather than sooner since Zoë seems used to the Doctor's plans always meaning trouble.