First Frontier (novel)

Publisher's Summary
'''Ace raised her blaster. 'You've already killed me once, girl,' Kreer said. 'Didn't you learn anything from that?

When Bernice asks to see the dawn of the space age, the Doctor takes the TARDIS to the United States of America in 1957 - and into the midst of distrust and paranoia. The Cold War is raging, bringing the world to the brink of atomic destruction.

But the threat facing America is far more deadly than Communist Russia. The militaristic Tzun Confederacy have made Earth their next target for conquest - and the aliens are already among us.

Two nuclear warheads have been stolen; there are traitors to the human species in the highest ranks of the army; and alien infiltrators have assumed human form. Only one person seems to know what’s going on: the army’s mysterious scientific advisor, the enigmatic Major Kreer.

Characters
The Doctor
 * Has Majestic clearance with the US government.

Ace
 * Will be 27 in a few months.
 * Can fly a Hercules miltary plane, thanks to what the Doctor refers to as the 'narrow minded military'. keeping things similar in all air born craft.
 * She used to fly a spacehopper in the Spacefleet.

Bernice Summerfield
 * Thinks of the Doctor and Ace as her only family.
 * Is immune to the Master's hypnotism.
 * Imagines the Doctor marrying the TARDIS.

Major Kreer (aka The Master)
 * Was able to recover enough following his fight with the Doctor on the Cheetah Planet to teleport back to Earth, however the explosion of the planet transported him back 32 years.
 * Used Tzun genetic engineering to remove the Trakenite DNA from his body to restore him to a full Time Lord.
 * The Master regenerates after Ace shoots him in the back.
 * He respects Bernice for her paper on Martian Feudalism.
 * Claims to be a Time Lord of the first rank.

Continuity

 * The Master acquired the Trakenite DNA after stealing Tremas's body in The Keeper of Traken.
 * The Master last appeared in Survival.
 * The Sidhe (mentioned in this novel) appear in Autumn Mist.
 * The Tzun appear in Mission: Impractical.
 * A single Tzun appears in Return of the Living Dad.
 * Bandranginus Five was mined and squashed to a ball in The Pirate Planet.