“Only Human” by Gareth Roberts (2005) — Doctor Who
Synopsis
A “dirty” rip in time and a Neanderthal in 21st Century London. That’s enough to draw the Doctor’s attention. However, whenever and wherever he came from, the Doctor can’t get Das the Neanderthal back to his own time without the effects of time travel killing him, so the Doctor enlists Captain Jack Harkness to mind him for a month to acclimate him to the 21st Century while the Doctor and Rose investigate the past, only to find a party of scientists from the future experimenting on humanity’s ancestors.
“The Last of the Gaderene” by Mark Gatiss (2000) — Doctor Who
Synopsis
Something mysterious is happening with mysterious people mysteriously at a nearby abandoned airfield, which is the cover for an impending alien invasion. Already the aliens have taken possession of several Very Important People at the Defense Ministry to smooth other everything and are hunting for the Lost MacGuffin in order to begin the invasion. Fortunately someone was old friends with the Brigadier and knew just how to bypass security to contact him directly. The Brig, of course, sends the Doctor, after he gets back from a little side trip that has nothing to do with the main story, and soon everything turns into (pseudo) Zombie Apocalypse! with villagers getting implanted with alien embryos to control them to hold off the UNIT troops until the actual invasion begins. All is saved when a WW II Spitfire airplane dives into the teleportation beam and halts the invasion permanently.
“The Harvest of Time” by Alastair Reynolds (2013) — Doctor Who
Synopsis
Mysterious events involving disappearing oil rigs and a secret Defense Ministry project attract UNIT’s attention, especially when the Master’s involvement becomes apparent. The Master is being used as a consultant by a Ministry of Defense communications project but in reality he is using them to broadcast a tachyon rescue signal to his past and future selves. However, the rapacious alien race of the Sild intercept the signal and use it to pluck various incarnations of the Master out of time, starting to erase him from existence. Then the alien invasion begins, whose object is to capture the Master himself as the Master Stroke of their Master Plan of creating the Master Computer, built of all the incarnations of the Master they were collecting. 1 They don’t find him, thanks to the interference of the Doctor who came to rescue him, which only leads to the aliens capturing him anyway in the far-flung future. But that is exactly what the Master wants, because the Master is in control of the computer, not the Sild, as they discover.