Final Genesis (comic story)

Summary
Then: A bomb explodes, killing the Doctor and Brigadier Lethbridge-Stewart.

Now: The TARDIS arrives with a rising tone, rather then the usual "vworp, vworp", the first sign for Ace and Benny that something is not quite right. Unable to get a straight answer out of the Doctor, they find the world itself isn't quite right. They see dinosaurs and are arrested by strangely familiar soldiers working for URIC rather than UNIT. The Doctor ingratiates himself into the URIC command; the late Doctor's assistant is familiar enough with regeneration and time travel to work out that although this is a Doctor, he is not their Doctor.

The Doctor becomes embroiled in the prevailing mystery. People across the globe -- humans, Silurians and Sea Devils -- have disappeared and unnatural beasts are attacking URIC. After an attack, one is captured and autopsied. It is a gestalt, a combination of the best genetic features of all three dominant species. After capturing a double-agent in URIC, they discover Imorkal, a rogue Silurian scientist and eugenicist, is behind the creation of the hybrid beasts. He has developed a gas he plans to release across London and then the globe. It will kill two-thirds of the infected and mutate the survivors. However, during a URIC attack on his base, an accident releases the gas, killing Imorkal. The Doctor watches coldly, protected by his Time Lord immune system and respiratory-bypass ability.

Before returning to the TARDIS, the Doctor visits his other self's grave, leaving Ace and Benny to muse about their "accidental" arrival and how for the Doctor, his parallel selves could be the closest thing he has to family.

Characters

 * The Doctor
 * Ace
 * Bernice Summerfield
 * Mortakk
 * Imorkal

Continuity

 * The Silurians first appeared in TV: Doctor Who and the Silurians and the Sea Devils in TV: The Sea Devils.
 * The Doctor, Ace and Bernice Summerfield travel to another alternate universe where Silurians and Sea Devils are present in PROSE: Blood Heat. In a possible nod to this, Final Genesis states the number of possible futures and divergent timelines from the first Silurians story is near endless.
 * The TARDIS lands with a different sound (a rising hum rather then the traditional "vworp vworp") Benny and Ace comment upon this, it's the first sign that something is amiss.
 * The TARDIS console room changes appearance in the middle of the story with no explanation.
 * It's implied that the Doctor knew about the death of his other self. Benny muses that other versions of himself could be the closest thing he has to family, so came here to avenge him.
 * As in The Robots of Death, the Doctor's enhanced respiratory system means he is unaffected by airborne chemicals (helium in Robots of Death, here a mutagen that affects all Earth sentients (ie Silurians, humans and Sea Devils). It mutates them into a gestalt version of the best traits of all three or kills them outright).
 * Ace's skill and familiarity with firearms is again shown. She fights alongside URIC forces.