Harry Brooks

The final days in the Bunker, with Hitler becoming more and more paranoid, plumbing the depths of his madness and reaching his well deserved fate.

The Doctor's TARDIS lands at the Snowcap space tracking station in Antarctica in December 1986. A routine space mission starts going wrong. When the base personnel's suspicions are roused, the Doctor informs them that the space capsule is being affected by the gravitational pull of another planet — a tenth planet in the Solar system.

An American intelligence agent attempts to kidnap a top Nazi general.